Brisk movement (7)
I believe the answer is:
allegro
'brisk movement' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for allegro that I've seen before include "Scored briskly" , "Brisk mus. speed" , "Instruction to perform in lively fashion" , "In a brisk and lively manner" , "Old car" .)