Soundly told off but delighted (4)

I believe the answer is:

rapt

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

'delighted' is the definition.
(I've seen this before)

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

(Other definitions for rapt that I've seen before include "Part (anag.)" , "Spellbound in part" , "Part being transported" , "Very attentive" , "Absorbed and enchanted" .)

I've seen this clue in The Globe and Mail.

Want a hint initially instead of a full solution? Install my app