Sky Sports says the Scotland midfielder is keen on a loan move away.
"Graham knows the situation," Clarke told the Birmingham Mail. "He knows where he is and he works well in training every day.
"He actually asked to play in the last Under-21 game (against Liverpool). He came to me and said 'gaffer, I need a game'.
"That tells you he is in a positive frame of mind and wants to keep himself in good shape.
"At the moment there are no big issues."
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