### Clue: A voracious reader (8)
### Answer: BOOKWORM 
 ### Explanation: Definition: A voracious reader
  Cryptic defn. (or Double defn?) A figurative description of someone who reads or studies a lot,voraciously.  Or one of many insects like the silverfish and woodlouse that greedily,voraciously consumes,reads? books (more specifically the paste in the binding).