Devoured repast (beans) at regular intervals (5)
I believe the answer is:
eaten
'devoured' is the definition.
(similar in meaning)
'repast beans at regular intervals' is the wordplay.
'at regular intervals' indicates alternate letters.
'repast'+'beans'='repastbeans'
The alternate letters of 'repastbeans' are 'EATEN'.
(Other definitions for eaten that I've seen before include "Taken into the body as food" , "courses enjoyed?" , "This bread is soon forgotten, it's said" , "Upset" , "Polished off" .)