Told about particular backsliding, one being allowed to escape (7)
I believe the answer is:
related
'told' is the definition.
(as in relating a story)
'about particular backsliding one being allowed to escape' is the wordplay.
I cannot quite see how this works, but
'about' could be 're' ('re' means regarding or about) and 're' is found within the answer.
'one' could be 'a' (a thing is one thing) and 'a' is present in the answer.
'being' could be 'ted' (Ted is an example) and 'ted' is found within the answer.
A single letter 'l' remains which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for related that I've seen before include "Having family links" , "Father and son have to be" , "similar" , "Agnate" , "Like family members" .)