Crossword Genius

Pest annually makes its appearance obnoxiously (12)

Ross

I believe the answer is:

unpleasantly

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'its appearance obnoxiously' is the definition.
I can't tell whether this definition defines the answer.

'pest annually makes' is the wordplay.
'makes' indicates an anagram.
'pest'+'annually'='pestannually'
'pestannually' anagrammed gives 'UNPLEASANTLY'.

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I've seen this clue in The Irish News.
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