Idiot has cheap wine and beer regularly (7)
I believe the answer is:
plonker
'idiot' is the definition.
(plonker can informally mean a fool)
'cheap wine and beer regularly' is the wordplay.
'cheap wine' becomes 'plonk' (plonk can informally mean cheap wine).
'and' means one lot of letters go next to another.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
The alternate letters of 'beer' are 'er'.
'plonk'+'er'='PLONKER'
'has' is the link.
(Other definitions for plonker that I've seen before include "Fool - smacking kiss" , "Stupid person" , "Inept person (slang)" , "Foolish person - smacking kiss" , "Fool (slang)" .)