Alpine climber (4)
I believe the answer is:
ibex
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">alpine climber</span>' is the definition.<br/ ><span class="explanation-format__explanation">(the ibex is a mountain goat)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for ibex that I've seen before include "Pyrenean mountain goat" , "Sure-footed type" , "being nimble-footed" , "Wind goat of North Africa" , "Mountain-goat" .)