The most common and most likely answer to this crossword clue is the 5 letter word SWOON
I've seen this crossword clue in Financial Times
S
W
O
O
N
More clues leading to the result SWOON
- Wife bought in before long, becoming faint
- Faint, without disturbing younger family member
- Initially struggling, win out of nowhere, become ecstatic
- Faint edges of shadow obscuring front of satellite
- Faint bit of writing readily accepted
- Court in session – banks collapse
- Presently being full of whisky, black out
- Faint shortly overcoming wife
- Pass out seeing court enthralled by case of sedition
- Now so upset as to faint
Buddy explains!

The straight part
We know that "Faint" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case faint = swoon.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 SWOON mean?
SWOON noun- A faint.
- An infatuation.
- To faint, to lose consciousness.
- (by extension) To be overwhelmed by emotion, especially infatuation.
- To make a moan, sigh, or some other sound expressing infatuation or affection.