Scoundrels seizing a popular firm making protective clothing (9)

I believe the answer is:

raincoats

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'making protective clothing' is the definition.
I can't tell whether this defines the answer.

'scoundrels seizing a popular firm' is the wordplay.
'scoundrels' becomes 'rats' (rat can mean a scoundrel or dishonourable person).
'seizing' is an insertion indicator (inserted letters are seized).
'popular' becomes 'in' ('in' can mean trendy).
'firm' becomes 'co' (abbreviation for company).
'a'+'in'+'co'='ainco'
'rats' placed around 'ainco' is 'RAINCOATS'.

Can you help me to learn more?

(Another definition for raincoats that I've seen is " Croatians (anag.)".)

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