The most common and most likely answer to this crossword clue is the 8 letter word TWERKING
I've seen this crossword clue in The Guardian
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Buddy explains!
The straight part
We know that "Provocative moves" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case provocative moves = twerking.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 TWERKING mean?
TWERKING verb- To twitch or jerk.
- To move the body in a sexually suggestive twisting or gyrating fashion.
- To dance in a sexually suggestive manner, often involving rapid movement.