Bishop's headwear (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bishop's headwear</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for mitre that I've seen before include "that goes over a cleric's head?" , "Bishop's headwear" , "What a bishop may have on" , "symbol of ecclesiastical authority" , "One identifies bishop" .)