Crossword Genius

Long difficult journey (4)

Ross

I believe the answer is:

trek

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

(Other definitions for trek that I've seen before include "Footslog" , "Difficult journey on foot" , "Long hike" , "Long walk, expedition" , "A long hard march" .)

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