The most common and most likely answer to this crossword clue is the 7 letter word TARRIED
I've seen this crossword clue in The Guardian
T
A
R
R
I
E
D
More clues leading to the result TARRIED
Buddy explains!

The straight part
We know that "Hung about" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case hung about = tarried.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 TARRIED mean?
TARRIED verb- To delay; to be late or tardy in beginning or doing anything.
- To linger in expectation of something or until something is done or happens.
- To abide, stay or wait somewhere, especially if longer than planned.
- To stay somewhere temporarily.
- To wait for; to stay or stop for; to allow to linger.