Long hard journey (4)
I believe the answer is:
trek
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">long hard journey</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for trek that I've seen before include "Extended journey" , "Long walk, expedition" , "Great journey" , "Difficult journey on foot" , "Long hard journey on foot" .)