Suggest replacing Democrat with Republican is something attractive (6)
I believe the answer is:
allure
'suggest replacing democrat' is the definition.
I can't judge whether this defines the answer.
'republican is something attractive' is the wordplay.
'republican' becomes 'al' (I can't explain this - if you can you should believe this answer much more).
'is something attractive' becomes 'lure' (something which lures people).
'al'+'lure'='ALLURE'
'with' is the link.
Can you help me to learn more?
(Other definitions for allure that I've seen before include "Transport" , "The power to entice or attract" , "Powerful fascination" , "Entice; appeal" , "Powerful attraction" .)