Crossword Genius

Are raincoats covering bottom up deterring flasher? (5,6)

Ross

I believe the answer is:

speed camera

I'm a little stuck... Click here to teach me more about this clue!

'raincoats covering bottom up deterring flasher?' is the definition.
I don't know anything about this answer so I cannot tell whether this works.

'are' is the wordplay.
I cannot quite understand how this works, but
an anagram of 'are' is 'era' which is located in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for speed camera that I've seen before include "Road safety device" , "Roadside deterrent" , "Roadside snapper" , "Roadside picture taker" , "Roadside feature" .)

I've seen this clue in The Independent.
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