Clue: Work includes book rest trashed? Author's to make a racket (12)
Answer: OBSTREPERATE
Explanation: Definition: to make a racket
**OPERATE** ("work") *includes* **B**(ook) +***(rest)***, *so **O(B-STRE)PERATE** 
*Chambers indicates that Laurence Sterne used this word, hence the "author's" in the clue.**