Crossword Genius

For poetical work on reflection, an author here performs parts (2,3,2)

Ross

I believe the answer is:

in aid of

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'for' is the definition.
(thesaurus)

'poetical work on reflection an author here performs parts' is the wordplay.
I cannot quite understand how this works, but
'work' could be 'aid' (aid is a kind of work) and 'aid' is found in the answer.
'on' could be 'o' (I've seen this in other clues) and 'o' is present in the answer.
'an' could be 'i' (Roman numeral for one) and 'i' is located in the answer.
This may be the basis of clue (or it may be nonsense).

Can you help me to learn more?

I've seen this clue in The Telegraph.
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