Crossword Genius

In posh car, dodgy banker's opening padded envelope (5,3)

Ross

I believe the answer is:

jiffy bag

'padded envelope' is the definition.
(I've seen this before)

'in posh car dodgy banker's opening' is the wordplay.
'in' indicates putting letters inside.
'posh car' becomes 'Jag' (short for Jaguar).
'dodgy' becomes 'iffy' (both can mean dubious).
'opening' indicates taking the first letters.
The first letter of 'bankers' is 'b'.
'iffy'+'b'='iffyb'
'jag' enclosing 'iffyb' is 'JIFFY-BAG'.

(Another definition for jiffy bag that I've seen is " Padded envelope".)

I've seen this clue in The Telegraph.
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