Crossword Genius

I can't promise to make changes. Curses! (12)

Ross

I believe the answer is:

imprecations

'curses' is the definition.
(imprecation is a kind of curse)

'i can't promise to make changes' is the wordplay.
'to make changes' indicates an anagram (I've seen this in other clues).
'cant'+'promise'='cantpromise'
'cantpromise' with letters rearranged gives 'mprecations'.
'i'+'mprecations'='IMPRECATIONS'

I've seen this clue in The Globe and Mail.
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