Grizzled (5)
I believe the answer is:
hoary
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">grizzled</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 hoary that I've seen before include "Grey-haired and old" , "Grey haired; old (joke)" , "Grizzly - ancient" , "White or grey, or old as of joke" , "Grizzled or frosted" .)