Upright stone slab (5)
I believe the answer is:
stela
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">upright stone slab</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for stela that I've seen before include "Upright stone slab" , "People having digs" , "Inscribed column" , "Standing stone" , "Stone tablet" .)