Brilliance of good man caught in honey trap (6)
I believe the answer is:
lustre
'brilliance' is the definition.
(I've seen this before)
'good man caught in honey trap' is the wordplay.
'good man' becomes 'st' (abbreviation for saint).
'caught in' is an insertion indicator.
'honey trap' becomes 'lure' (honey trap can mean a lure or bait).
'st' put within 'lure' is 'LUSTRE'.
'of' is the link.
(Other definitions for lustre that I've seen before include "Polish" , "brilliance" , "Gentle sheen, soft glow" , "Glory, distinction" , "Rustle up the sheen" .)