Crossword Genius

Space-time tunnel (8)

Ross

I believe the answer is:

wormhole

(Other definitions for wormhole that I've seen before include "Hypothetical link across space-time" , "could be ruined?" , "In theory, shortcut in space" , "Hypothetical tunnel in space-time" , "Cavity make in wood by burrowing larvae" .)

I've seen this clue in The Times.
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