Author and journalist backed enemy (5)
I believe the answer is:
defoe
'author' is the definition.
(Daniel Defoe)
'journalist backed enemy' is the wordplay.
'journalist' becomes 'ed' (short for editor).
'backed' is a reversal indicator.
'enemy' becomes 'foe' (I've seen this before).
'ed' in reverse letter order is 'de'.
'de'+'foe'='DEFOE'
'and' acts as a link.
(Other definitions for defoe that I've seen before include "Daniel, writer, d. 1731" , "18th-century author" , "Daniel, author of Robinson Crusoe" , "See 14" , "Gulliver author" .)