Function in November completely rejected meat (7)
I believe the answer is:
venison
'meat' is the definition.
(venison is a kind of meat)
'function in november completely rejected' is the wordplay.
'function' becomes 'sine' (mathematical function).
'in' is an insertion indicator.
'november completely' becomes 'nov' (I can't justify this - if you can you should give a lot more credence to this answer).
'rejected' says the letters should be written in reverse.
'sine' placed inside 'nov' is 'nosinev'.
'nosinev' in reverse letter order is 'VENISON'.
Can you help me to learn more?
(Other definitions for venison that I've seen before include "Deer meat" , "Game" , "Type of meat" , "Deer (as food)" , "Flesh of deer" .)