Worsening annoyance (11)

I believe the answer is:

aggravation

I believe this clue is a double definition.

'worsening' is the first definition.
(thesaurus)

'annoyance' is the second definition.
(aggravation is a kind of annoyance)

(Another definition for aggravation that I've seen is " Annoyance will result".)

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

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