Note is occasionally read and belittled (9)
I believe the answer is:
minimised
'belittled' is the definition.
('belittled'->'minimized' is in my internal thesaurus and 'ize'->'ise')
'note is occasionally read' is the wordplay.
'note' becomes 'minim' (type of musical note).
'occasionally' indicates alternate letters.
The alternating letters of 'read' are 'ed'.
'minim'+'is'+'ed'='MINIMISED'
'and' acts as a link.
(Other definitions for minimised that I've seen before include "Made as small as possible" , "Made light of" .)