A mummy may have one, perhaps (5)
I believe the answer is:
curse
'a mummy may have one perhaps' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for curse that I've seen before include "Blaspheme; damn" , "Cuss" , "Execrate" , "Wish harm on" , "Trouble" .)