Able lad composed poetic work (7)

I believe the answer is:

ballade

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'poetic work' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.

'able lad composed' is the wordplay.
'composed' indicates an anagram.
'able'+'lad'='ablelad'
'ablelad' is an anagram of 'BALLADE'.

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(Other definitions for ballade that I've seen before include "Short lyrical composition" , "Piece for piano" , "Able lad (anag) - composition for piano" , "Musical composition" , "Poem" .)

I've seen this clue in The Guardian.

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