No gas here to cook coq au vin Queen wanted (2,5)
I believe the answer is:
in vacuo
'no gas here' is the definition.
(there is no gas in a vacuum)
'cook coq au vin queen wanted' is the wordplay.
'cook' indicates anagramming the letters.
'queen' becomes 'q' (abbreviation for queen in chess).
'wanted' suggests deleting specific letters (want can mean to lack or be deprived of).
'coq'+'au'+'vin'='coqauvin'
'coqauvin' with 'q' taken away is 'coauvin'.
'coauvin' is an anagram of 'IN VACUO'.
'to' acts as a link.
(Other definitions for in vacuo that I've seen before include "amid empty space" , "In a vacuum (Latin)" , "Engulfed by emptiness" , "Not based on evidence (Latin)" , "Unrelated to context" .)