Producing coal fire, our bacon's cooked (13)

I believe the answer is:

carboniferous

I'm a little stuck... Click here to teach me more about this clue!

'producing coal' is the definition.
I can't tell whether this defines the answer.

'fire our bacon's cooked' is the wordplay.
'cooked' is an anagram indicator (letters cooked into a new form).
'fire'+'our'+'bacons'='fireourbacons'
'fireourbacons' anagrammed gives 'CARBONIFEROUS'.

Can you help me to learn more?

(Another definition for carboniferous that I've seen is " Producing coal; geological period".)

I've seen this clue in The Telegraph.

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