Month of fasting for Muslims (7)
I believe the answer is:
ramadan
'month of fasting for muslims' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for ramadan that I've seen before include "Moslem fast" , "Islam's holiest month" , "Islamic holy month" , "Month of fasting from dawn to dusk" , "lunar month" .)