Subject of fiction with grand title elevated (8)
I believe the answer is:
liegeman
'subject' is the definition.
(I've seen this before)
'fiction with grand title elevated' is the wordplay.
'fiction' becomes 'lie' (I've seen this in other clues).
'with' means one lot of letters go next to another.
'grand' becomes 'g' ('G' can be a synonym of 'grand').
'title' becomes 'name' (I've seen this before**).
'elevated' is a reversal indicator.
'name' backwards is 'eman'.
'lie'+'g'+'eman'='LIEGEMAN'
'of' acts as a link.
(Other definitions for liegeman that I've seen before include "Person serving lord" , "Loyal follower" , "Vassal, subject" , "A loyal person" .)