Member raising support given gin cocktail at get-together (7)
I believe the answer is:
meeting
'get-together' is the definition.
(I've seen this before)
'member raising support given gin cocktail' is the wordplay.
'member' becomes 'm'.
'raising' says the letters should be written backwards.
'support' becomes 'tee' (I've seen this before**).
'given' means one lot of letters go next to another.
'cocktail' is an anagram indicator.
'tee' backwards is 'eet'.
'gin' is an anagram of 'ing'.
'm'+'eet'+'ing'='MEETING'
'at' is the link.
(Other definitions for meeting that I've seen before include "fixture" , "Get-together" , "Rendezvous" , "Encountering" , "Assembly" .)