Group unhappy making record (3,4)
I believe the answer is:
set down
'record' is the definition.
(thesaurus)
'group unhappy' is the wordplay.
'group' becomes 'set' (set is a kind of group).
'unhappy' becomes 'down' (I've seen this before).
'set'+'down'='SET-DOWN'
'making' is the link.
(Other definitions for set down that I've seen before include "is allowed to alight" , "Drop (passengers); write" , "Record in writing" , "player's position at Wimbledon, perhaps" , "position of losing tennis player" .)