Cool stall in Billingsgate once? (11)
I believe the answer is:
standoffish
'cool' is the definition.
(I've seen this before)
'stall in billingsgate once?' is the wordplay.
I cannot quite understand how this works, but
'stall' could be 'stand' (synonyms) and 'stand' is located in the answer.
The remaining letters 'offish' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for standoffish that I've seen before include "Cool" , "like a half of rugby?" , "Unfriendly" , "Cold" , "Reserved, aloof" .)