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Go with chief to deliver complete type of project (7)

Ross

I believe the answer is:

turnkey

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'deliver complete type of project' is the definition.
I can't tell whether this defines the answer.

'go with chief' is the wordplay.
'go' becomes 'turn' (as in one's go or turn in a game).
'with' is a charade indicator (letters next to each other).
'chief' becomes 'key' (I've seen this in another clue).
'turn'+'key'='TURNKEY'

'to' is the link.

Can you help me to learn more?

(Other definitions for turnkey that I've seen before include "[SCREW]" , "Designed and ready for immediate use by the purchaser" , "Old guard" , "Warder banging up" , "ready to start working immediately" .)

I've seen this clue in The Irish Times.
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