European schoolboy gains foremost of scholarships (8)
I believe the answer is:
estonian
'european' is the definition.
(person from Estonia)
'schoolboy gains foremost of scholarships' is the wordplay.
'schoolboy' becomes 'etonian' (I've seen this before).
'gains' means one lot of letters goes inside another.
'foremost of' indicates taking the first letters.
The initial letter of 'scholarships' is 's'.
'etonian' placed around 's' is 'ESTONIAN'.
(Other definitions for estonian that I've seen before include "Northern European" , "Native of Tallinn, say" , "From Tallinn, for example" , "From one of the three Baltics" , "Foreign" .)