Model left demoralised by what's brought up (6)
I believe the answer is:
Here is my best explanation:
'what's brought up' is the definition.
(raising is a kind of bringing up)
'model left demoralised' is the subsidiary indication.
'left' indicates named letters should be taken away.
'demoralised' with 'model' removed is 'raised'.
'by' is the link.
(Other definitions for raised that I've seen before include "Brought up, a child say", "Lifted up; introduced (point)", "Collected for a purpose", "Brought up, a child or subject", "Reared", "Lifted up or nurtured", "Uplifted", "Erected", "Elevated" and "Lifted up, elevated".)