Least shabby ditties composed (7)

I believe the answer is:

tidiest

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'least shabby' is the definition.
I can't tell whether this definition defines the answer.

'ditties composed' is the wordplay.
'composed' indicates an anagram.
'ditties' is an anagram of 'TIDIEST'.

Can you help me to learn more?

(Other definitions for tidiest that I've seen before include "optimally arranged" , "Neatest" , "most trim" , "smarter than anything" , "Extremely organised" .)

I've seen this clue in The Mirror.

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