Crossword Genius

A wave of reaction (8)

Ross

I believe the answer is:

backwash

I believe this clue is a double definition.

'a wave' is the first definition.
(I know that backwash is a type of wave)

'reaction' is the second definition.
(thesaurus)

'of' is the link.

(Other definitions for backwash that I've seen before include "Unpleasant after-effects" , "Wake" .)

I've seen this clue in The Telegraph and The Globe and Mail.
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