Make schoolboy atone in error (7)
I believe the answer is:
etonian
'make schoolboy' is the definition.
'etonian' can be an answer for 'schoolboy' (I've seen this before). I am not sure about the 'make' bit.
'atone in error' is the wordplay.
'error' indicates anagramming the letters.
'atone'+'in'='atonein'
'atonein' anagrammed gives 'ETONIAN'.
Can you help me to learn more?
(Other definitions for etonian that I've seen before include "Public school boy" , "student in establishment?" , "Relating to one particular school" , "One educated at famous public school" , "Public schoolboy" .)