Temperamental as a harp? (6,6)
I believe the answer is:
highly strung
'temperamental' is the definition.
Both the definition and answer are adjectives.
Perhaps they are linked in a way I don't understand?
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for highly strung that I've seen before include "Nervous, easily upset" , "Very nervous or volatile" , "like the violino piccolo" , "Tense and easily upset" , "Very sensitive" .)