Circling oil platform, sustainable power demanded — privileged few going to the country? (5,5,7)

I believe the answer is:

green welly brigade

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'circling oil platform sustainable power demanded privileged few going to the country?' is the definition.
I can't tell whether this definition defines the answer.

'circling oil platform sustainable power demanded' is the wordplay.
'circling' is an insertion indicator (circling can mean going around or containing).
'oil platform' becomes 'rig' (I've seen this before).
'sustainable' becomes 'green'.
'power' becomes 'welly' (I've seen this before).
'demanded' becomes 'bade' (as bade is the past tense of bid).
'green'+'welly'+'bade'='greenwellybade'
'rig' inserted into 'greenwellybade' is 'GREEN WELLY BRIGADE'.

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I've seen this clue in The Guardian.

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