Mare hair (4)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">mare hair</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for mane that I've seen before include "Neck hair of an animal" , "(Lion's) hair on neck" , "Long thick hair" , "Long flowing hair" , "Hair (of lion)" .)