"Hail," in old Rome (3)
I believe the answer is:
ave
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hail in old rome</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 ave that I've seen before include "Latin greeting" , "Hail in graveyard." , "Hail to the old Romans" , "Hail as to Maria" , "Hail as to Caesar" .)