Nudge for daughter (4)
I believe the answer is:
prod
'nudge' is the definition.
('prod' can be a synonym of 'nudge')
'for daughter' is the wordplay.
'for' becomes 'pro' (I've seen this before).
'daughter' becomes 'd'.
'pro'+'d'='PROD'
(Other definitions for prod that I've seen before include "Dig" , "Poke with stiff finger to urge" , "Poke; reminder" , "Poke, stimulate into action" , "Urge or stimulate" .)