Birthplace of Muhammad (5)
I believe the answer is:
mecca
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">birthplace of muhammad</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 mecca that I've seen before include "Islam's holiest city" , "place many visit" , "Holiest city of 13 Across, place of annual pilgrimage" , "Tourist magnet" , "Birthplace of the Prophet Mohammed" .)