Reindeer (7)
I believe the answer is:
caribou
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">reindeer</span>' is the definition.<br/ ><span class="explanation-format__explanation">(caribou is a type of reindeer)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for caribou that I've seen before include "North American reindeer" , "N. American reindeer" , "Ruminant" , "Arctic deer - a Rio cub (anag)" , "Arctic beast" .)