For a scallywag partly fitting description? (8)

I believe the answer is:

rascally

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'fitting description?' is the definition.
Both the definition and answer are adjectives. Perhaps you can see an association between them that I can't see?

'for a scallywag partly' is the wordplay.
'partly' indicates the answer is hidden within the clue (part of the clue is used).
'RASCALLY' is hidden within 'for a scallywag'.

Can you help me to learn more?

(Another definition for rascally that I've seen is " Mischievous".)

I've seen this clue in The Sun.

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