First buyer left one politician’s sound proof cine-camera covers (6)

I believe the answer is:

blimps

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'sound proof cine-camera covers' is the definition.
The definition and answer can be both man-made objects as well as being plural nouns.
Maybe there's a link between them I don't understand?

'first buyer left one politician's' is the wordplay.
'first buyer' becomes 'b' (1st letter of 'buyer').
'left' becomes 'l' (common abbreviation).
'one' becomes 'i' (Roman numeral).
'politician's' becomes 'MP's' (Member of Parliament).
'b'+'l'+'i'+'mps'='BLIMPS'

Can you help me to learn more?

(Another definition for blimps that I've seen is " Small airships".)

I've seen this clue in the Sydney Morning Herald.

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