The type that regularly gobbles suet? (5)
I believe the answer is:
obese
'the type' is the definition.
(a body type)
'regularly gobbles suet?' is the wordplay.
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
'gobbles'+'suet'='gobblessuet'
The alternate letters of 'gobblessuet' are 'OBESE'.
'that' acts as a link.
(Other definitions for obese that I've seen before include "Stout" , "getting well-upholstered" , "Carrying far too much weight" , "Significantly overweight" , "likely to tip the balance?" .)