Crossword Genius

Describing a boom in the travel industry (5)

Ross

I believe the answer is:

sonic

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If this is the answer, I'm afraid I cannot explain it.

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(Other definitions for sonic that I've seen before include "Like mine, possibly" , "Relating to sound waves" , "Involving sound waves, say a boom" , "Type of boom" , "Kind of boom" .)

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