Central part containing black, gold and blackish-green (7)

I believe the answer is:

corbeau

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'blackish-green' is the definition.
I don't know anything about this answer so I can't tell whether this works.

'central part containing black gold' is the wordplay.
'central part' becomes 'core' (I've seen this before).
'containing' indicates putting letters inside.
'black' becomes 'b' (abbreviation as in pencil classifications).
'gold' becomes 'Au' (Au is the chemical symbol for gold).
'core' placed around 'b' is 'corbe'.
'corbe'+'au'='CORBEAU'

'and' acts as a link.

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I've seen this clue in The Guardian.

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