A pretence backfiring for old storyteller (5)
I believe the answer is:
aesop
'old storyteller' is the definition.
'aesop' can be an answer for 'storyteller' (Aesop is an example). I am not certain of the 'old' bit.
'a pretence backfiring' is the wordplay.
'pretence' becomes 'pose' (pose is a kind of pretence).
'backfiring' says the letters should be written in reverse.
'pose' back-to-front is 'esop'.
'a'+'esop'='AESOP'
'for' is the link.
Can you help me to learn more?
(Other definitions for aesop that I've seen before include "Great Greek teller of animal fables" , "story teller" , "Greek storyteller" , "his writings were fabulous" , "classic author" .)