Calls for fool to receive smack, finally (4)
I believe the answer is:
asks
'calls for' is the definition.
('ask' can be a synonym of 'call for')
'fool to receive smack finally' is the wordplay.
'fool' becomes 'ass' (ass is a kind of fool**).
'to receive' indicates putting letters inside.
'finally' says to take the final letters.
The last letter of 'smack' is 'k'.
'ass' going around 'k' is 'ASKS'.
(Other definitions for asks that I've seen before include "Inquiries" , "Puts a query" , "is curious" , "Solicits" , "Makes an inquiry" .)