Cook complimentary about most of sweet fool (9)
I believe the answer is:
fricassee
'cook' is the definition.
(fricasseeing is a kind of cooking)
'complimentary about most of sweet fool' is the wordplay.
'complimentary' becomes 'free' ('free' can be a synonym of 'complimentary').
'about' indicates putting letters inside.
'most of sweet' becomes 'ic' (I can't justify this - if you can you should believe this answer much more).
'fool' becomes 'ass' (ass is a kind of fool).
'ic'+'ass'='icass'
'free' going around 'icass' is 'FRICASSEE'.
Can you help me to learn more?
(Other definitions for fricassee that I've seen before include "Dish of meat served in a thick white sauce" , "Meat/veg stew, white sauce" , "eat this?" , "food" , "chicken feed!" .)