Willing student gets a new set of instruments (7)
I believe the answer is:
gamelan
'set of instruments' is the definition.
The definition suggests a singular noun which matches the answer.
'willing student gets a new' is the wordplay.
'willing' becomes 'game' (game can mean willing to do something).
'student' becomes 'L' (as in L-plates for learner drivers).
'gets' means one lot of letters go next to another.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'game'+'l'+'a'+'n'='GAMELAN'
Can you help me to learn more?
(Other definitions for gamelan that I've seen before include "Balinese orchestra" , "exotic orchestra" , "Indonesian orchestra" , "instrument" , "Asian ensemble" .)