Carnivore and wife having vegans’ meal regularly (6)
I believe the answer is:
weasel
'carnivore' is the definition.
(I know that weasel is a type of mustelid)
'wife having vegans' meal regularly' is the wordplay.
'wife' becomes 'w' (abbreviation).
'having' says to put letters next to each other.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
'vegans'+'meal'='vegansmeal'
The alternating letters of 'vegansmeal' are 'easel'.
'w'+'easel'='WEASEL'
'and' is the link.
(Other definitions for weasel that I've seen before include "Boggle" , "Sly character" , "Old jingle 'Pop goes the . . . . . .'" , "Equivocate - small animal" , "Stoat-like animal" .)