Crossword Genius

Long arduous journey (4)

Ross

I believe the answer is:

trek

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">long arduous journey</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>

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

I've seen this clue in The Times and The Guardian.
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