Some treat entirely devoured (5)
I believe the answer is:
eaten
'devoured' is the definition.
(similar in meaning)
'some treat entirely' is the wordplay.
'some' indicates the answer is hidden within the clue (some parts of the word are used).
'EATEN' can be found hidden inside 'treat entirely'.
(Other definitions for eaten that I've seen before include "courses enjoyed?" , "Put away" , "demolished, possibly" , "What's taken in" , "having been fed?" .)