Stream of abuse as crab is shelled and thrown in the rising sea (6)

I believe the answer is:

tirade

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'stream of abuse' is the definition.
(a tirade is an angry rant)

I cannot understand how the rest of the clue works.

(Other definitions for tirade that I've seen before include "Verbal outburst" , "lecture" , "Prolonged speech of abuse" , "A long, abusive outburst" , "Fulmination" .)

I've seen this clue in the Sydney Morning Herald.

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