Take repast regularly? (3)
I believe the answer is:
eat
'take' is the definition.
(eating is a kind of taking)
'repast regularly?' is the wordplay.
'regularly?' indicates alternate letters (regularly take one letter, leave next etc.).
The alternating letters of 'repast' are 'EAT'.
(Other definitions for eat that I've seen before include "Dine in a restaurant" , "Scoff" , "Take food" , "Corrode" , "tolerate in diet" .)