Radiance of holy man amid temptation (6)
I believe the answer is:
lustre
'radiance' is the definition.
(lustre is a kind of radiance)
'holy man amid temptation' is the wordplay.
'holy man' becomes 'st'.
'amid' indicates putting letters inside.
'temptation' becomes 'lure' (lure is a kind of temptation).
'st' put into 'lure' is 'LUSTRE'.
'of' is the link.
(Other definitions for lustre that I've seen before include "Brilliant quality in a material, porcelain, etc" , "Period" , "Glory, distinction" , "Gentle sheen, soft glow" , "Gloss, sheen" .)