Hello, Elle!
Still dry here, but there are flood warnings further South in the Edinburgh area.
I looked up Fred MacMurray.
He looked like a Hollywood star!
I did not really recognise him, though.
13a, The girl is "My RA" (Royal Artillery are the Gunners).
20d is a new word for me, "pale tot", a "tot" is a "nip" of strong drink, and a "paletot" is an overcoat, apparently.
4d, I was at this one for quite a while!
I am not convinced by my parse, but here we go!
Two answers are "a" and "a", intelligence could possibly be "wit", but i can't fathom why "head" is there?
Unless being a "wit" means you have a "head of intelligence", but I doubt it?
That's as near as I can get, Elle!
Setter has beat me!
Hope you and the dog don't get wet!