Tiny blonde turned out to be an author (4,6)
I believe the answer is:
enid blyton
'author' is the definition.
(I know that Enid Blyton has the occupation author)
'tiny blonde turned out' is the wordplay.
'turned out' indicates an anagram (turn out can mean to organise).
'tiny'+'blonde'='tinyblonde'
'tinyblonde' is an anagram of 'ENID BLYTON'.
'to be an' is the link.
(Other definitions for enid blyton that I've seen before include "Writer of children's books, d. 1968" , "Noddy's creator" , "Famous Five author" , "Children's author" .)