Suddenly burly Pat got reformed (8)

I believe the answer is:

abruptly

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'suddenly' is the definition.
(synonyms)

'burly pat got reformed' is the wordplay.
'burly pat' anagrams to 'ABRUPTLY'.
But, I am not clear how the anagram is indicated.

Can you help me to learn more?

(Other definitions for abruptly that I've seen before include "Suddenly and without warning" , "Suddenly and unexpectedly" , "brusque manner" , "Quickly and without warning" , "In a rude or curt manner" .)

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

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