Clinton looks to next challenge
He is set to face Walsall on the final day of the season but is looking elsewhere for his next challenge.
The Republic of Ireland international signed for the U's in the summer of 2012 and has made 70 appearances in his two year spell.
"I still feel I've got a few years left in me and I want those final few years of my playing career to be spent playing a lot of games.
"I am a player that isn't happy when I'm not playing, you shouldn't be playing professional football if you are happy not playing, but overall I have enjoyed my time here and wish the club well."