Speaking to Sky Blue Player, Clingan who spent two seasons at the City Ground, said: "I had a couple of good years there, getting promoted with the club, and I enjoyed my time there.
"I got a bit of stick thte last time I went there with Coventry but I don't mind that. It's all part of the game."
Clingan also said that the players wanting to bounce back from Saturday's loss against Leeds and he added; "We've got a confident bunch of lads to be fair and we just want to bounce back with a result against Forest.
"We have to perform over there but I don't think the Leeds result will be getting the lads too downhearted because we have a good group in the dressing room and we know we have to improve from Saturday."