The most common and most likely answer to this crossword clue is the 7 letter word MAILLOT
I've seen this crossword clue in The Guardian
M
A
I
L
L
O
T
More clues leading to the result MAILLOT
- Top post: one’s destiny?
- Mike has trouble getting good deal for sports top
- Using post, distribute tights
- Dancer’s habit of setting up band brother with Destiny
- Swimsuit showing letters and large number
- Post parcel containing jersey
- Detrimental effect this person’s found twirling around in tights
- Weak old runner going around in tights
- Swimwear? You get plenty by post
- Fee I'm raising in Jersey
Buddy explains!

The straight part
We know that "Dancer’s habit" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case dancer’s habit = maillot.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 MAILLOT mean?
MAILLOT noun- A one-piece swimsuit (for women)
- A leotard or tights of stretchable jersey fabric, generally worn by dancers and gymnasts.