Angler is versatile author (8)
I believe the answer is:
salinger
'author' is the definition.
(JD Salinger)
'angler is versatile' is the wordplay.
'versatile' indicates anagramming the letters.
'angler'+'is'='angleris'
'angleris' anagrammed gives 'SALINGER'.
(Other definitions for salinger that I've seen before include "J. D. ..., author of Catcher in the Rye" , "US author of The Catcher in the Rye" , "Jerome D ........ wrote ` ` The Catcher in the Rye' '" , "US novelist" , "'JD..., author of The Catcher in the Rye (8)'" .)