Wine-lover, slippery weaselly one (9)
I believe the answer is:
wolverine
'weaselly one' is the definition.
(type of weasel)
'wine-lover slippery' is the wordplay.
'slippery' indicates an anagram (I've seen this in other clues).
'wine'+'lover'='winelover'
'winelover' anagrammed gives 'WOLVERINE'.
(Other definitions for wolverine that I've seen before include "Large carnivore" , "Evil owner of lupine female" , "wild beast" , "glutton, in America" , "Wild animal, also known as glutton" .)