Robber in group carrying apparatus (7)
I believe the answer is:
brigand
'robber' is the definition.
(thesaurus)
'group carrying apparatus' is the wordplay.
'group' becomes 'band' (band is a kind of group).
'carrying' indicates putting letters inside.
'apparatus' becomes 'rig' (I've seen this before).
'band' going around 'rig' is 'BRIGAND'.
'in' acts as a link.
(Other definitions for brigand that I've seen before include "Highway robber" , "desperado" , "Outlaw" , "Robber - darn big (anag)" , "Marauder" .)