Lying face upwards (6)
I believe the answer is:
supine
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">lying face upwards</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 supine that I've seen before include "Lying face upwards, indolent" , "Prostrate" , "Lethargic" , "Use pin (anag.)" , "Inert; on one's back" .)