Sermon translated by an old Scandinavian (8)
I believe the answer is:
norseman
'old scandinavian' is the definition.
'norseman' can be an answer for 'scandinavian' (Norsemen were ancient Scandinavians). I am unsure of the 'old' bit.
'sermon translated by an' is the wordplay.
'translated' indicates an anagram.
'by' is a charade indicator (letters next to each other).
'sermon' is an anagram of 'norsem'.
'norsem'+'an'='NORSEMAN'
Can you help me to learn more?
(Other definitions for norseman that I've seen before include "Scandinavian" , "invader" , "A viking, perhaps" , "one attacking north-east?" .)