Mosque tower (7)
I believe the answer is:
minaret
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">mosque tower</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for minaret that I've seen before include "Tower from which muezzin calls Muslims to prayer" , "Mosque's tower" , "Tower attached to mosque" , "religious tower" , "Slim tower of a mosque" .)