Type of glass (4,7)
There are a few possibilities for this:
lead crystal
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">type of glass</span>' is the definition.<br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for crystal that I've seen before include "Highly-transparent glass" , "Clear mineral, eg, quartz" , "Glass-like quartz" , "Cut-glass" , "The fortune teller may use a . . . . . . . ball" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">type of glass</span>' is the definition.<br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for tumbler that I've seen before include "Drinking glass or old acrobat" , "A large glass" , "One flips" , "One repeatedly turning over" , "slipper may become this" .)