One trial revealing a garbled story (8)
I believe the answer is:
relation
'a garbled story' is the definition.
'relation' can be an answer for 'story' (relation is a kind of story). I'm unsure of the 'a garbled' bit.
'one trial revealing' is the wordplay.
'revealing' is an anagram indicator.
'one'+'trial'='onetrial'
'onetrial' anagrammed gives 'RELATION'.
Can you help me to learn more?
(Other definitions for relation that I've seen before include "Eg, father" , "wife?" , "Connection; narrative" , "Telling" , "Person related by blood or marriage" .)