Turn your back on litter-dropper during row (6)
I believe the answer is:
disown
'turn your back on' is the definition.
'litter-dropper during row' is the wordplay.
'litter-dropper' becomes 'sow' (sows give birth to litters of piglets).
'during' means one lot of letters goes inside another.
'row' becomes 'din' (both can mean a loud disturbance).
'sow' inserted inside 'din' is 'DISOWN'.
(Other definitions for disown that I've seen before include "Wins do (anag)" , "Reject all connection or relationship with" , "Reject all connection with, refuse to acknowledge" , "Refuse responsibility for" , "Repudiate or refuse to acknowledge a relationship" .)