Brother of Remus (7)
I believe the answer is:
romulus
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">brother of remus</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for romulus that I've seen before include "City developer" , "One of the legendary founders of Rome" , "Founder of Rome from our slum" , "Twin brother of Remus" , "Brother of 25 across" .)