McClelland started off playing football with Shamrock Rovers at an early age. He moved on to Templeogue United and also enjoyed spells at Peamount United & Crumlin United before returning to Shamrock Rovers where he played with their Under 19's side in the 2014–15 season. He made his first senior appearance on 28 April 2015 when he came off the bench for the final 5 minutes of a 3–1 win away to Athlone Town in the Leinster Senior Cup. That proved to be his only senior appearance for Rovers as he moved on to UCD in July 2015, playing for their Under 19's side.
UCD
McClelland made his first senior appearance for UCD on 19 July 2015 in a friendly against Liverpool at the UCD Bowl. With the UCD first team fatigued following their UEFA Europa League campaign, it allowed McClelland a chance to make his first career senior appearance in a league game on 31 July 2015 when he came off the bench in a 3–0 win away to Cabinteely. He was an unused substitute in 7 other first team games that season as he continued to play with the under 19's. The 2016 season was McClelland's first season as a full first team player. His first career goal came on 3 June 2016 when he scored a 64th-minute goal in a 2–0 win at home to Shelbourne. He would again be the enemy of Shelbourne the following month when he scored an 84th-minute winner in a 2–1 win for UCD at Tolka Park. His final goal of the season came on 30 September 2016 when he scored in an 8–1 demolition of Waterford at the RSC. He finished the season with 20 appearances and 3 goals. The 2017 season saw UCD finish in third place in the league, with McClelland appearing 28 times in all competitions, scoring 7 goals. The 7 May 2018 saw him score his first career hat-trick as his side thumped Wexford 8–0 at Ferrycarrig Park. On 28 September2018, he played the full 90 minutes away to League of Ireland Premier Division ChampionsDundalk in the FAI Cup Semi Finals as his side were denied a place in the Aviva Stadium by a narrow 1–0 scoreline. That was the clubs final game of the season in a year which saw McClelland score 10 goals in 32 appearances in all competitions and also receive the first silverware of his career as his side gained promotion by winning the 2018 League of Ireland First Division. 2019 saw McClelland's first taste of League of IrelandPremier Division action. On 5 July he scored the winner in a crucial 1–0 victory over relegation fighting rivals Finn Harps. The season proved to be a difficult one for UCD as they finished bottom of the league and were relegated back to the First Division. The season did however provide a lot of experience at top tier level for McClelland, as he made 42 appearances in all competitions, scoring 4 goals.
St Patrick's Athletic
On 8 November 2019 it was announced that McClelland had signed for St Patrick's Athletic, becoming manager Stephen O'Donnell's first ever signing for the club. Upon signing, he spoke of his excitement at signing his first professional contract and his ambitions for the season ahead being to help the club get back to UEFA Europa League qualification. He made his competitive debut on the 14th February 2020, making the starting eleven as his side lost 1–0 against Waterford in the opening game of the season at Richmond Park.
