Jewelled headdresses (6)
I believe the answer is:
tiaras
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">jewelled headdresses</span>' is the definition.<br/ ><span class="explanation-format__explanation">(tiara is a kind of jewelled headdress)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for tiaras that I've seen before include "Jewelled headdresses" , "Headbands" , "Jewelled crowns for women" .)