Crossword Genius

Subterranean (11)

Ross

I believe the answer is:

underground

'subterranean' is the definition.
(synonyms)

This is all the clue.

(Other definitions for underground that I've seen before include "Travel on this" , "Subterranean" , "Secret resistance movement" , "Tube; covert" , "Transport system" .)

I've seen this clue in the Evening Standard.
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