Suitably nifty clues, if solved (12)

I believe the answer is:

sufficiently

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'suitably' is the definition.
Both the answer and definition are adverbs. Maybe there's an association between them I don't understand?

'nifty clues if solved' is the wordplay.
'solved' is an anagram indicator (the anagram must be solved).
'nifty'+'clues'+'if'='niftycluesif'
'niftycluesif' is an anagram of 'SUFFICIENTLY'.

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(Another definition for sufficiently that I've seen is " Adequately".)

I've seen this clue in The Telegraph.

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