Jewish mourning period (5)
I believe the answer is:
shiva
'jewish mourning period' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for shiva that I've seen before include "God presiding over personal destinies" , "Major Hindu deity (the destroyer)" , "Hindu god, the destroyer" , "Destroyer goddess of Hinduism" , "powerful deity" .)