I thought I'd resurrect this one as I am still struggling on one of the clues.
For those that suggested answers, here are the solutions to my original post:-
4 - Plain as any name can be (4) Mary. (As sung by James Cagney in 'Yankee Doodle Dandy')
9 - She had a connection with gin (8)Jennifer (as suggested by Bernie)
10 - She picked grapes with him (10) Marguerite From 'Ma Belle Marguerite' in Bless the Bride
14 - She was in love (5) Tammy. From 'Tammy and the Bachelor' sung by Debbie Reynolds
So any idea for
21 - A very nice girl (5)
Thanks in advance to all contributers