Outlaw in gang carrying equipment (7)
I believe the answer is:
brigand
'outlaw' is the definition.
(brigand is a kind of outlaw)
'gang carrying equipment' is the wordplay.
'gang' becomes 'band' (both can mean a group of people).
'carrying' means one lot of letters goes inside another.
'equipment' becomes 'rig' (rig is a kind of equipment).
'band' enclosing 'rig' is 'BRIGAND'.
'in' acts as a link.
(Other definitions for brigand that I've seen before include "Robber in a gang" , "Country robber" , "Gang member" , "Plunderer" , "Freebooter" .)