... chatter among Saints follows! (6)
I believe the answer is:
stalks
'follows' is the definition.
(stalk is a kind of follow)
'chatter among saints' is the wordplay.
'chatter' becomes 'talk' (I've seen this before).
'among' is an insertion indicator.
'saints' becomes 'ss'.
'talk' put inside 'ss' is 'STALKS'.
(Other definitions for stalks that I've seen before include "Follows a prey stealthily" , "Follows or tracks stealthily, game or victim" , "Shadows with plant stems" , "Tracks or pursues stealthily" , "Hunts" .)