Slightly supportive of Charlie and other half initially going to live together (7)

I believe the answer is:

cohabit

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'live together' is the definition.
(synonyms)

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

(Other definitions for cohabit that I've seen before include "Share residence" , "What some items do" , "House-share" , "Live together as unmarried couple" , "What to do with partner" .)

I've seen this clue in The Independent.

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