If Palace offer decent money for Clyne then it makes sense to let him go, but I have a feeling he may stay in the same way Sturridge did this last season.
Firstly he'll be on a good wage here, which I doubt anyone else will be able to meet. We could really do with cover at left back and right back, which Clyne provides, and he's out of contract next summer. I think it makes sense for him to stay with us, knowing he will get a fair amount of playing time in the cups, a real chance of picking up a few medals with us before he leaves. He's only 28 still, so it's not like the clock is ticking that fast for him.
Then he gets his choice of club next summer to go and get the playing time he wants along with a big wedge of a signing on fee.