Crossword Genius

A large destructive sea wave produced by a submarine earthquake, subsidence or volcanic eruption (7)

Ross

I believe the answer is:

tsunami

(Other definitions for tsunami that I've seen before include "Large ocean wave" , "big wave" , "Freak wave" , "Huge wave caused by earth tremor" , "Huge destructive sea wave" .)

I've seen this clue in The Independent.
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