Russian stringed instrument (9)
I believe the answer is:
balalaika
'russian stringed instrument' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for balalaika that I've seen before include "Russian guitar-like instrument" , "Russian triangular musical instrument" , "Three-stringed, triangularbodied Russian instrument" , "Russian "guitar"" , "Foreign instrument" .)