Crossword Genius

Did Clyde finally become criminal? Unquestionably (9)

Ross

I believe the answer is:

decidedly

'unquestionably' is the definition.
('decidedly' can be a synonym of 'unquestionably')

'did clyde finally become criminal?' is the wordplay.
'finally' says to take the final letters.
'criminal?' is an anagram indicator (I've seen 'criminal' mean this).
The final letter of 'become' is 'e'.
'did'+'clyde'+'e'='didclydee'
'didclydee' is an anagram of 'DECIDEDLY'.

I've seen this clue in The Independent.
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