Oath (5)
'oath' is the definition.
(synonyms)
This is all the clue.
(Other definitions for curse that I've seen before include "Anathema" , "Invoke evil upon" , "Trouble" , "use bad language" , "Wish harm on" .)
'oath' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for vow that I've seen before include "Plight" , "Oath or solemn promise" , "Pledge, take oath" , "Solemn pledge" , "Binding promise" .)