Toil in Starmer's team (6)

I believe the answer is:

labour

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'toil' is the definition.
(I know that toil can be written as labour)

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for labour that I've seen before include "Donkey-work" , "Workforce" , "Painful time" , "Hard work, toil" , "What mothers have been through" .)

I've seen this clue in The Sun.

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