On which to write strange tales? (5)
I believe the answer is:
slate
'on which to write' is the definition.
I can't judge whether this definition defines the answer.
'strange tales?' is the wordplay.
'strange' indicates anagramming the letters.
'tales' is an anagram of 'SLATE'.
Can you help me to learn more?
(Other definitions for slate that I've seen before include "list of candidates" , "Bluish-grey colour" , "Roofing material or credit recorder" , "Grey stone; tab" , "Blast" .)