Teacher returns with extremely large duck for dinner (7)
I believe the answer is:
risotto
'duck for dinner' is the definition.
The definition and answer can be both things that one consumes for nourishment as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'teacher returns with extremely large' is the wordplay.
'teacher' becomes 'sir' (way of addressing a male teacher).
'returns' says the letters should be written in reverse.
'with' means one lot of letters go next to another.
'extremely large' becomes 'otto' (I can't justify this - if you can you should believe this answer much more).
'sir' in reverse letter order is 'ris'.
'ris'+'otto'='RISOTTO'
Can you help me to learn more?
(Other definitions for risotto that I've seen before include "Italian dish of rice, meat and vegetables" , "You cook it in stock" , "Italian dish cooked with broth" , "Italian recipe" , "Italian food" .)