Nudists on a get-together have all the details (3,3,4)
I believe the answer is:
ins and outs
'all the details' is the definition.
(I've seen this in another clue)
'nudists on a get-together' is the wordplay.
'nudists on a' can be anagrammed to 'INS AND OUTS'.
Though, I am not clear how this is indicated.
'have' acts as a link.
Can you help me to learn more?
(Other definitions for ins and outs that I've seen before include "signs on doors perhaps" , "parliamentary election result?" , "cabinet reshuffle?" , "Details" .)