Crossword Genius

Labour MP is a fighter (4)

Ross

I believe the answer is:

benn

I'm a little stuck... Click here to teach me more about this clue!

'labour mp' is the definition.
The definition suggests a singular noun which matches the answer.

'is a fighter' is the wordplay.
'is' becomes 'be'.
'a fighter' becomes 'nn' (I can't explain this - if you can you should give a lot more credence to this answer).
'be'+'nn'='BENN'

Can you help me to learn more?

(Another definition for benn that I've seen is " Tony -, Br. politician".)

I've seen this clue in The Guardian.
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