Ticked off author Woolf, strangely boycotting Oscars (8)

I believe the answer is:

wrathful

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'ticked off' is the definition.
(thesaurus)

I cannot understand how the rest of the clue works.

(Other definitions for wrathful that I've seen before include "Infuriated, incensed" , "Extremely angry" .)

I've seen this clue in the Sydney Morning Herald.

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