Politician needs a role with Reform – ultimately by-election should follow (3,8)

I believe the answer is:

lee anderson

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'politician needs a role' is the definition.
I don't know anything about this answer so I can't tell whether this works.

'with reform ultimately by-election should follow' is the wordplay.
I cannot quite understand how this works, but
'with' could be 'and' and 'and' is located in the answer.
This may be the basis of the clue (or it may be nonsense).

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