Tells tales (8)
'tells tales' is the definition.
'narrates' can be an answer for 'tells' ('narrate' can be a synonym of 'tell'). I also know that 'tales' relates to this answer.
This is the entire clue.
(Other definitions for narrates that I've seen before include "Tells (a story)" , "Recites, recounts" , "provides an account" .)
(Other definitions for tattles that I've seen before include "Gossips idly" , "Gives away secret" .)