What to do at the mention of cheese? (5)
I believe the answer is:
smile
This could be a double definition.
'what to do at' is the first definition.
The definition suggests a singular noun which matches the answer.
'mention of cheese?' is the second definition.
The definition and answer can be both related to communication as well as being singular nouns.
Maybe there's a link between them I don't understand?
'the' acts as a link.
Can you help me to learn more?
(Other definitions for smile that I've seen before include "Show happiness" , "Happy facial expression" , "Appear amused" , "express pleasure" , "Show amusement or pleasure" .)