Slowly and gracefully, in music (6)
I believe the answer is:
adagio
'slowly and gracefully in music' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for adagio that I've seen before include "moving slowly" , "In slow tempo" , "leisurely movement" , "' - - for Strings' (Barber)" , "Slow movement in musical work" .)