The most common and most likely answer to this crossword clue is the 7 letter word SINGLET
S
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N
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L
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T
More clues leading to the result SINGLET
- Half of prison allowed to have item of underwear
- Model seen with only one piece of underwear
- Adjustment in leg isn’t for upper garment
- Vest — and what finishes it off
- Top former record time
- Awkwardly silent about guy, initially appearing in underwear
- Gilbert oddly putting on wrong vest
- One-time sporting gear
- Characteristic of shirt and pants and vest
- Underwear that might make object out of butt?
Buddy explains!

The straight part
We know that "item of underwear" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case item of underwear = singlet.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 SINGLET mean?
SINGLET noun- A vest; a sleeveless garment with a low-cut neck, often worn underneath a shirt.
- A multiplet having a single member, especially a single spectroscopic peak.
- A quantum state having zero spin.
- (plurality, otherkinship) A single person occupying one human body.