The most common and most likely answer to this crossword clue is the 7 letter word SOBERED
S
O
B
E
R
E
D
Buddy explains!

The straight part
We know that "No longer drunk" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case no longer drunk = sobered.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 SOBERED mean?
SOBERED verb- (often with up) To make or become sober.
- (often with up) To overcome or lose a state of intoxication.
- To moderate one's feelings