Crossword Genius

Fury as maritime cities backed (5)


I believe the answer is:


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'fury' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for strop that I've seen before include "Prime cutthroat" , "Outburst" , "Sharpen an old blade" , "rage" , "Bad temper - sharpen (a razor)" .)

I've seen this clue in The Telegraph.
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