Take in tenants regularly (3)
I believe the answer is:
eat
'take in' is the definition.
(synonyms)
'tenants regularly' is the wordplay.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
The alternate letters of 'tenants' are 'EAT'.
(Other definitions for eat that I've seen before include "Ingest" , "put away" , "Break bread" , "get stuck in" , "Bit, chew and swallow" .)