Uncovered song about Duke’s wild flower (5,4)

I believe the answer is:

naked lady

I'm a little stuck... Click here to teach me more about this clue!

'duke's wild flower' is the definition.
I can't tell whether this definition defines the answer.

'uncovered song' is the wordplay.
'uncovered' becomes 'naked' (I've seen this before).
'song' becomes 'lady' (I can't justify this - if you can you should believe this answer much more).
'naked'+'lady'='NAKED LADY'

'about' acts as a link.

Can you help me to learn more?

(Other definitions for naked lady that I've seen before include "Meadow saffron" , "woman lacking 1 [UNDERGARMENTS]" , "Plant" .)

I've seen this clue in The Independent.

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