Wise woman’s repartee at church (5)
I believe the answer is:
witch
'wise woman's' is the definition.
(woman who knows about magic)
'repartee at church' is the wordplay.
'repartee' becomes 'wit' (I've seen this before).
'at' is a charade indicator (letters next to each other).
'church' becomes 'ch' (abbreviation on maps etc).
'wit'+'ch'='WITCH'
(Other definitions for witch that I've seen before include "... and magician" , "Hag, crone" , "'The Lion, the - - and the Wardrobe'" , "charming female" , "strange woman" .)