Urge a different debate (5)
I believe the answer is:
argue
'debate' is the definition.
(I've seen this before)
'urge a different' is the wordplay.
'different' indicates an anagram.
'urge'+'a'='urgea'
'urgea' is an anagram of 'ARGUE'.
(Other definitions for argue that I've seen before include "Quarrel, row" , "Contend verbally" , "Quarrel, bicker" , "Dispute - debate" , "Reason" .)