The most common and most likely answer to this crossword clue is the 4 letter word NEWT
I've seen this crossword clue in The Daily Telegraph
N
E
W
T
More clues leading to the result NEWT
- Creature wife caught in trap
- Amphibian’s leg removed by famous scientist
- Animal wife evidently caught?
- Fresh water essentially where it may breed
- Small creature not seen before tantalises at outset
- What’s dropping on famous scientist? Just ask
- Latest model with a distinctive crest, possibly
- Amphibian from west caught in snare
- Pond creature young toad initially turns into
- Having consumed whiskey, revolutionary number one is drunk, proverbially
Buddy explains!

The straight part
We know that "one is drunk, proverbially" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case one is drunk, proverbially = newt.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 NEWT mean?
NEWT noun- A small lizard-like amphibian in the family Salamandridae that lives in the water as an adult.