Crossword Genius

Exploring underground spaces (6)

Ross

I believe the answer is:

caving

'exploring underground spaces' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for caving that I've seen before include "Exploring underground spaces" , "Potholing" .)

I've seen this clue in the Irish Times (Simplex) and The Irish Times.
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