English school (4)
I believe the answer is:
eton
'english school' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for eton that I've seen before include "Note sent up to English public school" , "School; jacket type" , "Public school founded by Henry VI" , "Berkshire public school" , "College, collar or crop" .)