A small number, note (5)

I believe the answer is:

minim

'note' is the definition.
(type of musical note)

'a small number' is the wordplay.
'a small' becomes 'mini' (short for miniature).
'number' becomes 'M' (M is an example).
'mini'+'m'='MINIM'

(Other definitions for minim that I've seen before include "Half-semibreve" , "Two crotchets in one" , "note or > dose" , "Note equal to two crochets" , "Short note" .)

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app