Grab fragment of song (6)
I believe the answer is:
snatch
This clue is a double definition.
'grab' is the first definition.
('snatch' can be a synonym of 'grab')
'fragment of song' is the second definition.
(I've seen this before)
(Other definitions for snatch that I've seen before include "Seize - fragment of verse" , "Quickly grasp - fragment of song" , "Grab rudely, hastily" , "Grasp hurriedly" , "Deftly seize" .)