Boss's sore back leads to withdrawal from society (9)

I believe the answer is:

reclusion

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'withdrawal from society' is the definition.
'reclusion' can be an answer for 'withdrawal' (thesaurus). I'm unsure of the 'from society' bit.

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

Can you help me to learn more?

I've seen this clue in The Guardian.

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