Talk to father about mother's garment? (7)
I believe the answer is:
address
'talk to' is the definition.
(I've seen this before)
'father about mother's garment?' is the wordplay.
'father' becomes 'da' (da can mean dad).
'about' says the letters should be written backwards.
'mother's garment?' becomes 'dress' (garment worn by women).
'da' reversed gives 'ad'.
'ad'+'dress'='ADDRESS'
(Other definitions for address that I've seen before include "Place of abode" , "Place where someone lives" , "In almost desperate straits" , "Call" , "lecture?" .)