Clique member cool with scrumpy they say (7)
I believe the answer is:
insider
'clique member' is the definition.
'cool with scrumpy they say' is the wordplay.
'cool' becomes 'in' (I've seen this in other clues).
'with' means one lot of letters go next to another.
'scrumpy' becomes 'cider' (I've seen this before).
'they say' indicates a 'sounds like' (homophone) clue.
'cider' sounds like 'sider'.
'in'+'sider'='INSIDER'
(Other definitions for insider that I've seen before include "member of favoured group?" , "Privileged member of a group" , "One with privileged info" , "person with the lowdown" , "One with special knowledge" .)