The right man for the extreme left? (3)

I believe the answer is:

red

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'extreme left?' is the definition.
'red' can be an answer for 'left?' (red can informally mean communist). I am unsure of the 'extreme' bit.

'the right man' is the wordplay.
'the right' becomes 'r' (common abbreviation).
'man' becomes 'ed' (short for Edward).
'r'+'ed'='RED'

'for the' acts as a link.

Can you help me to learn more?

(Other definitions for red that I've seen before include "Primary colour" , "The colour of the former Russian army" , "Bordeaux claret, for instance" , "Colour of garnets" , "Flushed" .)

I've seen this clue in the Evening Standard.

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