Supportive of political paper? Keep going (8)
I believe the answer is:
protract
'keep going' is the definition.
(thesaurus)
'supportive of political paper?' is the wordplay.
'supportive of' becomes 'pro' (as in being pro a person or cause).
'political paper?' becomes 'tract' (tract can mean a political pamphlet).
'pro'+'tract'='PROTRACT'
(Other definitions for protract that I've seen before include "Extend length" , "Increase" , "Draw out, prolong" , "Drag out at length" , "Draw out, lengthen the time" .)