Frank is force-fed regularly (4)
I believe the answer is:
free
'frank' is the definition.
(I've seen this in other clues)
'force-fed regularly' is the wordplay.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
'force'+'fed'='forcefed'
The alternating letters of 'forcefed' are 'FREE'.
'is' is the link.
(Other definitions for free that I've seen before include "Liberated" , "Not working" , "Deliver" , "Release; gratis" , "Release - without charge" .)