Stories about slate (5)
I believe the answer is:
tales
'stories' is the definition.
(I know this)
'about slate' is the wordplay.
'about' indicates anagramming the letters.
'slate' is an anagram of 'TALES'.
(Other definitions for tales that I've seen before include "Stale kind of stories" , "Stories, perhaps tall ones" , "Stories, fables" , "They might be tall" , "accounts" .)