knee injury that kept him out for five weeks. Clingan made his first team return on 21 January 2015, in a 1–0 loss against Dundee. Three weeks later on 14 February 2015, Clingan scored the last minute goal, in a 3–2 win over Dundee United. Clingan continued to suffered two injuries towards the end of the season, as he made 27 appearances and scored two times in all competitions. At the end of the 2014–15 season, Clingan was released by the club. Linfield Having been without a club for the entire 2015–16 season, Clingan made his return to football by signing for NIFL Premiership side Linfield, linking up with former Northern Ireland colleagues David Healy and Roy Carroll. Glenavon Clingan left Linfield at the end of the 2016–17 season, and on 8 August 2017 it was announced that he had signed for Glenavon. His first goal for the club came in a 6–1 win over Ballymena United. Clingan's expertise from set pieces and penalties proved invaluable, scoring 12 goals as Glenavon ended the 2017–18 season with European qualification. Much of the following season, however, was disrupted by a long-term injury layoff which limited Clingan to just 10 appearances. Although Glenavon bettered the previous season's points total, a loss to Glentoran in the Europa League Playoff semi-final meant that they did not secure European football. On 23 June 2019, Clingan agreed another one-year deal at Glenavon, to the end of the 2019–20 season. Clingan's contract with Glenavon expired at the end of the 2019–20 season. However, following full recovery from a calf injury, Clingan re-signed for Glenavon on 18 December 2020, to the end of the 2020–21 season. He subsequently came off the bench in Glenavon's 2–1 away win against Warrenpoint Town the following day. Following a match against Linfield, Clingan sustained a knee injury which required surgery, effectively ending his playing career. Clingan retired at the end of the 2020–21 NIFL Premiership season. International career Clingan has represented Northern Ireland at under-17, under-19 and under-21 levels. He gained six under-21 caps and captained the side. He made his senior debut at the Giants Stadium in New York City against Uruguay during Northern Ireland's two-game tour of the US in May 2006. His first competitive senior cap came in the 3–0 home defeat by Iceland on 2 September 2006, in the first match of the Euro 2008 qualifying campaign, and he