Of a hipbone (5)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">of a hipbone</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for iliac that I've seen before include "bottom of a hip bone" , "Relating to part of the hip bone" , "Like certain body parts" , "Trojan" , "hipbone" .)