Rushes to find some instruments (5)
I believe the answer is:
reeds
I believe this clue is a double definition.
'rushes' is the first definition.
(I've seen this in another clue)
'some instruments' is the second definition.
(reed is a kind of instrument)
'to find' acts as a link.
(Other definitions for reeds that I've seen before include "Waterside plants" , "Thin pieces of cane in musical instruments" , "River grasses" , "Tall stiff marsh grasses" , "Long grasses" .)