Advance accepted say, for story (6)
I believe the answer is:
legend
'story' is the definition.
(legend is a kind of story)
'advance accepted say' is the wordplay.
'advance' becomes 'lend' (I've seen this before).
'accepted' indicates putting letters inside.
'say' becomes 'eg'.
'lend' enclosing 'eg' is 'LEGEND'.
'for' acts as a link.
(Other definitions for legend that I've seen before include "eg Robin Hood" , "Story from long ago" , "extremely famous person?" , "hero" , "Former top player" .)