The most common and most likely answer to this crossword clue is the 6 letter word GUZZLE
I've seen this crossword clue in Independent
G
U
Z
Z
L
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Buddy explains!

The straight part
We know that "wolf" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case wolf = guzzle.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does GUZZLE mean?
GUZZLE noun- Drink; intoxicating liquor.
- A drinking bout; a debauch.
- An insatiable thing or person.
- (provincial) A drain or ditch; a gutter; sometimes, a small stream. Also called guzzen.
- The throat
- To drink or eat quickly, voraciously, or to excess; to gulp down; to swallow greedily, continually, or with gusto.
- To consume alcoholic beverages, especially frequently or habitually.
- (by extension) To consume anything quickly, greedily, or to excess, as if with insatiable thirst.