Types of protection from backing dodgy scheme (4)

I believe the answer is:

macs

'types of protection' is the definition.
(macintosh is a protective coat)

'backing dodgy scheme' is the wordplay.
'backing' is a reversal indicator.
'dodgy scheme' becomes 'scam' (a scam is a scheme or fraud).
'scam' written backwards gives 'MACS'.

'from' is the link.

(Another definition for macs that I've seen is " Clothing".)

I've seen this clue in The Telegraph.

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