Teach yourself? Involves feeling some pain (4)

I believe the answer is:

achy

'feeling some pain' is the definition.
(feeling an ache)

'teach yourself? involves' is the wordplay.
'involves' indicates the answer is hidden within the clue.
'ACHY' can be found hidden inside 'teach yourself'.

(Other definitions for achy that I've seen before include "Persistently painful" , "discomfort" , "Continuously painful" , "Suffering minor pains" , "Dully painful" .)

I've seen this clue in The Telegraph.

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