Account about Ostrogoth leader in classical language (8)
I believe the answer is:
relation
'account' is the definition.
(I've seen this before)
'about ostrogoth leader in classical language' is the wordplay.
'about' becomes 're' (regarding**).
'leader' indicates taking the first letters.
'in' means one lot of letters goes inside another.
'classical language' becomes 'latin' (I've seen this before).
The initial letter of 'ostrogoth' is 'o'.
'o' going inside 'latin' is 'lation'.
're'+'lation'='RELATION'
(Other definitions for relation that I've seen before include "Kin" , "Reference" , "Person related by blood or marriage" , "Account" , "Mum or dad" .)