Finished, but I'm a bit irritated by some of this. The definition in 14a is just wrong. If he is going to include an unindicated Italian word, he should get the meaning of the other Italian word right! The wordplay for 21d doesn't seem to work.
Rant over - now my question. I have what seems to be the only sensible answer for 11a, but I don't see all the parsing - any hints?
Old people in love, I gathered, something in it for a performer (6,4)