In keeping with modern trends, there will be an area of the hall assigned for 'silent singing'. Please let me know if you would like seats reserved there.
If you're struggling with a clue, you could always ask for help. I know it was only a simple mistake you made, but it could have been avoided. As I'm such a stickler for parsing - in a parallel universe, maybe - how did you arrive at 'mud'?
It seems we dont like the same music. When I saw the clue I thought of Chew the Mud by Sub Secret. Putting star in gives mustard. Grunger's strange eating habits seemed to indicate this was right. But I agree your answer seems better. Only Grunger knows.
That will teach me not to try to be clever! I did intend custard but I now see another answer is acceptable. I suppose setters have this problem all the time. But really jigjag, does any one have mustard on apple pies? Having said that, I must admit I put in on steak pies (although not on custard pies!)