In that place (5)
(Other definitions for thorn that I've seen before include "tip of R [ROSE]" , "Sharp point on, eg, rose" , "Sharp-pointed stem-tip" , "Pointed growth" , "Prickly plant" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">in that place</span>' is the definition.<br/ ><span class="explanation-format__explanation">(over there)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for there that I've seen before include "Word of comfort" , "in that case" , "In that location" , "Yonder" , "Present" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">in that place</span>' is the definition.<br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for thereat that I've seen before include "At that point" , "At that place" , "On account of that" , "Theatre (anag)" .)