Extracted from mine, the necessary chemical (6)

I believe the answer is:

ethene

'chemical' is the definition.

'extracted from mine the necessary' is the wordplay.
'extracted from' indicates the answer is hidden within the clue.
'ETHENE' can be found hidden inside 'mine the necessary'.

(Another definition for ethene that I've seen is " Compound".)

I've seen this clue in The Times.

Want a hint initially instead of a full solution? Install my app