Day and date to eat chicken, primarily, as — this dish has it! (9)
I believe the answer is:
fricassee
'this dish has it' is the definition.
'fricassee' can be an answer for 'dish' (fricassee is a kind of dish). I'm unsure of the remainder of the definition.
'day and date to eat chicken primarily as' is the wordplay.
I cannot really understand how this works, but
'day' could be 'fri' (abbreviation for Friday) and 'fri' is present in the answer.
'date' could be 'see' (synonyms) and 'see' is found in the answer.
'as' is present in the answer.
A single letter 'c' remains which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for fricassee that I've seen before include "eat this?" , "Dish of stewed pieces of meat in a thick sauce" , "Stew of meat in thick white sauce" , "chicken feed!" , "Meat/veg stew, white sauce" .)