Son's taken after you for sure! (3)
I believe the answer is:
yes
'sure' is the definition.
(both are affirmative answers)
'son's taken after you' is the wordplay.
'taken after' is a charade indicator (letters next to each other).
'you' becomes 'ye' (historical version of 'you').
's' put after 'ye' is 'YES'.
'for' acts as a link.
(Other definitions for yes that I've seen before include "Positive reply" , "Of course" , "That's 27 [RIGHT]" , "Certainly!" , "Agreed" .)