Saint with silver for men only (4)
I believe the answer is:
stag
'men only' is the definition.
(I've seen this before)
'saint with silver' is the wordplay.
'saint' becomes 'st' (abbreviation).
'with' is a charade indicator (letters next to each other).
'silver' becomes 'Ag' (Ag is the chemical symbol for silver).
'st'+'ag'='STAG'
'for' acts as a link.
(Other definitions for stag that I've seen before include "Male deer; speculator" , "Hart" , "Male-only" , "Game - speculator" , "Adult male deer, often with antlers" .)