Soon lore will be translated into English (7)
I believe the answer is:
erelong
'soon' is the definition.
(archaic word meaning 'soon')
'lore will be translated into english' is the wordplay.
'will be translated' is an anagram indicator (translate can mean to transform).
'into' means one lot of letters goes inside another.
'english' becomes 'eng' (abbreviation).
'lore' is an anagram of 'relo'.
'relo' inserted into 'eng' is 'ERELONG'.
(Other definitions for erelong that I've seen before include "Soon (arch.)" , "Soon (poetically)" , "Soon (archaic)" , "Soon (poetic)" .)