Ostentatious jewellery (5)
I believe the answer is:
bling
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ostentatious jewellery</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for bling that I've seen before include "Flashy, ostentatious jewellery" , "Jewellery for show" , "Jazzy" , "Showy jewellery" , "Showy jewels etc" .)