Crossword Genius

Martian marking (5)

Ross

I believe the answer is:

canal

'martian marking' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for canal that I've seen before include "Aqueduct" , "Man-made channel of water" , "Passage" , "Duct" , "Inland waterway" .)

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