Free, like a new bass? (7)
I believe the answer is:
unbowed
I believe this clue is a double definition.
'free' is the first definition.
(I've seen this before)
'like a new bass?' is the second definition.
(not having a bow used on it yet)
(Other definitions for unbowed that I've seen before include "Not vanquished, free" , "Not accepting demands" , "Not defeated" , "Not having submitted to pressure" , "pizzicato?" .)