The most common and most likely answer to this crossword clue is the 9 letter word HEN-PECKS
I've seen this crossword clue in The Guardian
H
E
N
-
P
E
C
K
S
Buddy explains!
The straight part
We know that "Nags/ husband" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case nags/ husband = hen-pecks.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.