Date once rendered in account (8)
I believe the answer is:
anecdote
'account' is the definition.
(anecdote is a kind of account)
'date once rendered' is the wordplay.
'rendered' indicates an anagram.
'date'+'once'='dateonce'
'dateonce' is an anagram of 'ANECDOTE'.
'in' acts as a link.
(Other definitions for anecdote that I've seen before include "Yarn" , "Pithy account of an incident" , "A short amusing story, probably true" , "Date once (anag.)" , "Neat code (anag.)" .)