14a Short screw secures it for instrument G?I?A? Looks like guitar - but can't fathom it out
17a Even when rebuffed accepting a role in social gathering TEA ?A?T? Tea party but ditto
24a Way to resume play with part of actor's speech removed L?N? OUT Line out?
14a Gu-it-ar(d) - 'screw' is slang for a (prison) guard
17a Tea party - 'a part' (in) 'yet' (back=rebuffed)
24a Line-out - to resume a game of rugby & taking part of speech