What guest will do, perhaps consuming tons (4)
I believe the answer is:
stay
'what guest will do' is the definition.
The definition suggests a singular noun which matches the answer.
'perhaps consuming tons' is the wordplay.
'perhaps' becomes 'say' (both can mean 'for example').
'consuming' is an insertion indicator.
'tons' becomes 't'.
'say' placed around 't' is 'STAY'.
Can you help me to learn more?
(Other definitions for stay that I've seen before include "guy to > put off" , "Wait" , "Arrest" , "Put off - visit" , "Stanchion" .)