Resolved to discourage revolutionary material (10)
I believe the answer is:
determined
'resolved' is the definition.
(I've seen this before)
'discourage revolutionary material' is the wordplay.
'discourage' becomes 'deter' ('deter' can be a synonym of 'discourage').
'revolutionary' shows that the letters should be reversed in order.
'material' becomes 'denim' (denim is a kind of material**).
'denim' in reverse letter order is 'mined'.
'deter'+'mined'='DETERMINED'
'to' is the link.
(Other definitions for determined that I've seen before include "set" , "Decided - resolute" , "Found out" , "Firmly decided" , "Resolved" .)