Might one leave you simmering for a bit? (8)

I believe the answer is:
cannibal
'bit?' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'might one leave you simmering for a' is the wordplay.
I cannot quite see how this works, but
'might' could be 'can' and 'can' is present in the answer.
'one' could be 'i' (Roman numeral) and 'i' is found in the answer.
'a' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for cannibal that I've seen before include "Animal that eats its own kind" , "One eats human flesh" , "Fellow consumer" , "One with odd eating habits" , "Person eating human flesh" .)
