Slab (6)
I believe the answer is:
tablet
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">slab</span>' is the definition.<br/ ><span class="explanation-format__explanation">(tablet is a kind of slab)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for tablet that I've seen before include "A small pill or an inscribed panel on wall" , "Stone slab; pill" , "Pill; writing pad" , "Small pill or lozenge" , "Let bat provide a pill" .)