Curse that is extended by politician dealing with whip (9)
I believe the answer is:
imprecate
'curse' is the definition.
(synonyms)
'extended by politician dealing with whip' is the wordplay.
I cannot quite see how this works, but
'by' could be 'at' and 'at' is present in the answer.
'politician' could be 'mp' (Member of Parliament) and 'mp' is located in the answer.
'dealing with' could be 're' (regarding) and 're' is located in the answer.
The remaining letters 'ice' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'that is' acts as a link.
Can you help me to learn more?
(Other definitions for imprecate that I've seen before include "Put curse on (someone)" , "Invoke evil -- crime tape (anag)" , "Swear" .)