Reflective note (5)
I believe the answer is:
minim
'note' is the definition.
(musical note)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for minim that I've seen before include "Note equal to two crochets" , "Note of two crotchets" , "note or > dose" , "Double crotchet" , "Short note" .)