Beauty queen's crown (5)
I believe the answer is:
tiara
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">beauty queen's crown</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 tiara that I've seen before include "Jewelled head wear" , "Ornamental head gear" , "Jewelled head-ornament" , "Small crown" , "Jewelled head band" .)