Story teller has a pose that is strange (5)
I believe the answer is:
aesop
'story teller' is the definition.
(I've seen this in another clue)
'a pose that is strange' is the wordplay.
'that is strange' indicates anagramming the letters.
'pose' is an anagram of 'esop'.
'a'+'esop'='AESOP'
'has' is the link.
(Other definitions for aesop that I've seen before include "story teller" , "Poses as ancient Greek writer" , "Fabulous man" , "A pose of famed fable teller" , "Greek fable writer" .)