The most common and most likely answer to this crossword clue is the 7 letter word ADAGIOS
I've seen this crossword clue in The Daily Telegraph
A
D
A
G
I
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More clues leading to the result ADAGIOS
Buddy explains!

The straight part
We know that "slow movements" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case slow movements = adagios.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 ADAGIOS mean?
ADAGIOS noun- A tempo mark directing that a passage is to be played rather slowly, leisurely and gracefully.
- A passage having this mark.
- A male-female duet or mixed trio ballet displaying demanding balance, spins and/or lifts.