Initiate innovative genre on the cor anglais, say (9)

I believe the answer is:

greenhorn

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'initiate' is the definition.
(I know that greenhorn is a type of initiate)

'innovative genre on the cor anglais say' is the wordplay.
'innovative' is an anagram indicator.
'on' means one lot of letters go next to another.
'the cor anglais say' becomes 'horn' (I can't justify this - if you can you should give a lot more credence to this answer).
'genre' anagrammed gives 'green'.
'green'+'horn'='GREENHORN'

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(Other definitions for greenhorn that I've seen before include "One learning" , "Gullible type" , "Novice" , "Inexperienced fellow" , "Rookie (American)" .)

I've seen this clue in the Sydney Morning Herald.

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