Peru's capital (4)
I believe the answer is:
lima
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">peru's capital</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 lima that I've seen before include "Mail it to Peruvian city" , "Peruvian capital" , "South American capital" , "Mail to capital of Peru" , "city (like 22)" .)