Belittle our bearing (9)
I believe the answer is:
demeanour
'bearing' is the definition.
(I've seen this before)
'belittle our' is the wordplay.
'belittle' becomes 'demean' (I've seen this before).
'demean'+'our'='DEMEANOUR'
(Other definitions for demeanour that I've seen before include "Manner of behaving towards others" , "Conduct" , "Look" , "Behaviour" , "Appearance and attitude" .)