Rugged (6)
I believe the answer is:
craggy
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">rugged</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for craggy that I've seen before include "Rocky and steep" , "Hilly; rugged" , "(Of rock) rough, uneven" , "Mountainous" , "Weather-beaten" .)