Naughty kids finally admit mistakes (7)
I believe the answer is:
terrors
'naughty kids' is the definition.
'terrors' can be an answer for 'kids' (terror is a kind of kid). I'm unsure of the 'naughty' bit.
'finally admit mistakes' is the wordplay.
I cannot quite understand how this works, but
'mistakes' could be 'errors' ('error' can be a synonym of 'mistake') and 'errors' is located in the answer.
A single letter 't' remains which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Another definition for terrors that I've seen is " Great fears".)