Take in repasts regularly (3)
I believe the answer is:
eat
'take in' is the definition.
(to eat is to take in food)
'repasts regularly' is the wordplay.
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
The alternate letters of 'repasts' are 'EAT'.
(Other definitions for eat that I've seen before include "get stuck in" , "Ingest" , "Bite, chew and swallow" , "Be corrosive" , "Make food disappear" .)