Having twinges after exercise? Very good (6)

I believe the answer is:

peachy

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'very good' is the definition.

'having twinges after exercise?' is the wordplay.
'having twinges' becomes 'achy' (I can't justify this - if you can you should believe this answer much more).
'after' is a charade indicator (letters next to each other).
'exercise?' becomes 'pe' (Physical Education).
'achy' put after 'pe' is 'PEACHY'.

Can you help me to learn more?

(Other definitions for peachy that I've seen before include "Delicious" , "excellent!" .)

I've seen this clue in The Times.

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