Clarinet part from conservatoire educator (4)
I believe the answer is:
reed
'clarinet part' is the definition.
(I've seen this before)
'from conservatoire educator' is the wordplay.
'from' indicates a hidden word.
'REED' can be found hidden inside 'conservatoire educator'.
(Other definitions for reed that I've seen before include "Blade of tall marsh grass" , "Plant of marshy land" , "Tall grass plant that grows in water" , "Vibrator in the mouthpiece of a wind instrument" , "Vibrating part of some instruments" .)