The most common and most likely answer to this crossword clue is the 7 letter word BIKINIS
I've seen this crossword clue in The Daily Telegraph
B
I
K
I
N
I
S
More clues leading to the result BIKINIS
Buddy explains!

The straight part
We know that "Garments" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case garments = bikinis.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 BIKINIS mean?
BIKINIS noun- A brief two-piece bathing suit worn by women, especially one that exposes the midriff and navel.
- A brief bathing suit worn by men.