Author writing about children's cakes (7,7)
I believe the answer is:
charles dickens
'author' is the definition.
(I've seen this before)
'about children's cakes' is the wordplay.
'about' indicates anagramming the letters.
'childrens'+'cakes'='childrenscakes'
'childrenscakes' is an anagram of 'CHARLES DICKENS'.
'writing' acts as a link.
(Other definitions for charles dickens that I've seen before include "English novelist" , "Writer" , "Novelist, 1812-70" , "Author" .)