Answer son and stay if working (7)
I believe the answer is:
satisfy
'answer' is the definition.
(I know that answer is a more specific form of the action satisfy)
'son and stay if working' is the wordplay.
'son' becomes 's' (genealogical abbreviation for son).
'and' is a charade indicator (letters next to each other).
'working' indicates an anagram.
'stay'+'if'='stayif'
'stayif' with letters rearranged gives 'atisfy'.
's'+'atisfy'='SATISFY'
(Other definitions for satisfy that I've seen before include "Fulfil, a desire or need" , "Fully meet (conditions)" , "Meet the needs of (someone)" , "Fulfill requirements" , "pay in full" .)