Assyrian foe (4)
I believe the answer is:
mede
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">assyrian foe</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 mede that I've seen before include "One of the old people" , "One of the old folk" , "Lawmaker" , "Old Indo-European" , "Ancient native of Persia" .)