Bass stringed instruments not initially tried in music genre (5)
I believe the answer is:
blues
'music genre' is the definition.
(I've seen this in another clue)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for blues that I've seen before include "Feeling of sadness or depression" , "colours" , "US music style" , "Australian redheads" , "Depression - music" .)