Independent politician seen as troublemaker (3)
I believe the answer is:
imp
'troublemaker' is the definition.
(I've seen this before)
'independent politician' is the wordplay.
'independent' becomes 'i'.
'politician' becomes 'mp'.
'i'+'mp'='IMP'
'seen as' acts as a link.
(Other definitions for imp that I've seen before include "little chap" , "Small mischievous spirit" , "old-fashioned graft" , "Naughty demon" , "A little devil of mischief" .)