Islamic month of fasting (7)
I believe the answer is:
ramadan
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">islamic month of fasting</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 ramadan that I've seen before include "The penitential ninth month of the Muslim year" , "Muslims observe this" , "Religious festival" , "Muslim month of fasting from sunrise to sunset" , "Moslem fast" .)