Jackie McNamara to replace Peter Houston at Dundee United Kilmarnock have signed Northern Ireland international Sammy Clingan on an 18-month deal. The 29-year-old was looking for a club after being released by Doncaster last month following a short spell where he made nine appearances. He is eligible for tomorrow night's Clydesdale Bank Premier League clash at Celtic Park, although he is short of match fitness. St Johnstone have agreed a deal to sign QPR midfielder Michael Doughty on loan. The 20-year-old arrived in Scotland this morning and could feature in tomorrow's Clydesdale Bank Premier League clash against Aberdeen at McDiarmid Park. Ross County have confirmed the signing of Canada defender Andre Hainault following a successful work permit application. The 26-year-old signs from Houston Dynamo, who he helped to two consecutive Major League Soccer Cup finals. Inverness have signed QPR midfielder Jordan Gibbons on loan until the end of the season. Caley Thistle say the 19 year-old wide midfielder is expected to feature in the squad for Wednesday night's game against St Mirren at Paisley. The Scottish Football Association say Danny Wilson would have served the suspension sparked by his League Cup final red card during a Barclays Premier League game as they confirmed he was eligible to play in Hearts' semi-final win. Partick duo Stephen O'Donnell and Stuart Bannigan are among four new faces in Scotland Under-21s coach Billy Stark's squad for next Wednesday's friendly in Greece. Kilmarnock forward Rory McKenzie is also included for the first time while Celtic goalkeeper Robbie Thomson replaces Tottenham's Jordan Archer, who has a game with loan club Wycombe on Monday night. Stuart Armstrong, Rhys McCabe and Tony Watt return to the squad after missing the 3-2 friendly defeat to Portugal in November through injury