Crossword Genius

Arduous journey (4)

Ross

I believe the answer is:

trek

'arduous journey' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for trek that I've seen before include "Long hike" , "Long hard journey on foot" , "A long arduous walk" , "Long walk in the mountains?" , "Long and difficult trip" .)

I've seen this clue in The Guardian, the Newsday, the Universal, The Telegraph, the King Feature Syndicate, The Wall Street Journal, the LA Times, the USA Today and The New York Times.
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