Degrade, put down (6)
I believe the answer is:
demean
This clue is a double definition.
'degrade' is the first definition.
(I know that degrade can be written as demean)
'put down' is the second definition.
(I know that put down can be written as demean)
(Other definitions for demean that I've seen before include "Cause (someone) to lose dignity" , "Lower in reputation, humiliate" , "Lower in reputation, shame" , "'Put down, degrade (6)'" , "Lower in reputation or standing" .)