Plod; safari (4)
I believe the answer is:
trip
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">plod</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >'<span class="explanation-format__original">safari</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ ></span>
(Other definitions for trip that I've seen before include "Catch one's foot" , "Pleasure excursion" , "Journey - miss one's footing" , "Stumble - excursion" , "Journey for some purpose" .)