Sang, turned green and ran (7)

I believe the answer is:

warbled

'sang' is the definition.
(warbling is a kind of singing)

'turned green and ran' is the wordplay.
'turned' is a reversal indicator.
'green' becomes 'raw' (both can mean naive or inexperienced).
'and' is a charade indicator (letters next to each other).
'ran' becomes 'bled' ('bleed' can be a synonym of 'run').
'raw' backwards is 'war'.
'war'+'bled'='WARBLED'

(Another definition for warbled that I've seen is " Sang with a quavering voice".)

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

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