To buck up rogue, cane ordered (9)
I believe the answer is:
encourage
'to buck up' is the definition.
(thesaurus)
'rogue cane ordered' is the wordplay.
'ordered' indicates an anagram.
'rogue'+'cane'='roguecane'
'roguecane' anagrammed gives 'ENCOURAGE'.
(Other definitions for encourage that I've seen before include "Motivate" , "Spurs on" , "Egg on" , "Hearten, inspire" , "Hearten, foster" .)