Forceful macho types check bags (8)
I believe the answer is:
vehement
'forceful' is the definition.
(I've seen this before)
'macho types check bags' is the wordplay.
'macho types' becomes 'hemen' (a he-man is a muscular man).
'check' becomes 'vet' (to vet someone is to check their background).
'bags' is an insertion indicator (bag can mean secures or steals).
'hemen' placed within 'vet' is 'VEHEMENT'.
(Other definitions for vehement that I've seen before include "Forcefully emphatic" , "Vigorously emphatic" , "heated" , "Ardently forceful" , "Forceful, emphatic" .)