Republican brought in to enumerate main points for planner (10)
I believe the answer is:
strategist
'planner' is the definition.
(strategist is a kind of planner)
'republican brought in to enumerate main points' is the wordplay.
'republican' becomes 'r' (abbreviation).
'brought in' indicates putting letters inside.
'to enumerate' becomes 'state'.
'main points' becomes 'gist' (I've seen this before).
'r' put within 'state' is 'strate'.
'strate'+'gist'='STRATEGIST'
'for' is the link.
(Other definitions for strategist that I've seen before include "Long-term planner" , "Expert on the art of planning war" , "general" .)