Punk Johnny way past ripe (6)

I believe the answer is:

rotten

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'way past ripe' is the definition.
(I've seen this in another clue)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for rotten that I've seen before include "Decomposed" , "Morally despicable" , "Decayed or corrupt (60" , "Decaying or morally corrupt" , "Falling to pieces from age or morally contemptible" .)

I've seen this clue in The Sun.

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