Old stringed instrument (5)
'old stringed instrument' is the definition.
(I've seen this before)
This is the entire clue.
(Another definition for gamba that I've seen is " Old stringed instrument".)
'old stringed instrument' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for viol that I've seen before include "Old consort instrument" , "Precursor of the violin" , "Early bowed stringed instrument" , "Old string instrument" , "Early string instrument" .)