Sat for a photo (5)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sat for a photo</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for posed that I've seen before include "Struck attitude, perhaps for painter" , "Assumed" , "Faced the camera" , "Arranged for pictorial purposes" , "Presented (a problem)" .)