Clue: In Jane's good books, offering sweets (8)
Answer: FONDANTS
Explanation: In Jane's good books, offering sweets (8)
Def: sweets 
(Jane) FONDA + NTs ("good books")
 
NT is already "books" rather than a book, so would have liked to see the S indicated somehow.
 
See alternative parsing in the comments, which makes more sense!