One needs pluck to play it (7)
I believe the answer is:
ukulele
'it' is the definition.
The definition suggests a singular noun which matches the answer.
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for ukulele that I've seen before include "Small guiter - George Formby played it" , "Small type of guitar" , "Small, four-stringed guitar" , "One needs pluck in this" , "Small 4-stringed guitar" .)