Playing one can cause a stir (5)
I believe the answer is:
sitar
'playing one' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'cause a stir' is the wordplay.
'a stir' anagrams to 'SITAR'.
Though, I am unsure how the anagram is indicated.
'can' acts as a link.
Can you help me to learn more?
(Other definitions for sitar that I've seen before include "Stringed instrument of the subcontinent" , "music producer" , "It takes pluck" , "Long-necked musical instrument of India" , "Indian string instrument" .)