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 not certain of the 'old' bit.
'sermon translated by an' is the wordplay.
'translated' indicates an anagram.
'by' means one lot of letters go next to another.
'sermon' with letters rearranged gives '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?" .)