Some collaborated to make compound (6)

I believe the answer is:

borate

'compound' is the definition.
(borate is a kind of compound)

'some collaborated to' is the wordplay.
'some' says the answer is hidden in the clue (some of the parts of the word are used).
'BORATE' is hidden within 'collaborated to'.

'make' is the link.

(Another definition for borate that I've seen is " salt".)

I've seen this clue in The Telegraph.

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