Pitched sets do turn out unexpectedly (6)

I believe the answer is:

tossed

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'pitched' is the definition.
('toss' can be a synonym of 'pitch')

'sets do turn out unexpectedly' is the wordplay.
'sets do' anagrams to 'TOSSED'.
However, I'm unsure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for tossed that I've seen before include "Thrown up in the air" , "Lobbed" , "Threw up, perhaps salad" , "Threw casually" , "Threw up lightly" .)

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

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