### Clue: Third from Massenet with Panurge to reveal some deep device (5,3)
### Answer: SPEAR GUN 
 ### Explanation: Definition: some deep device
  S(third letter from "Massenet) **plus**(with) **anagram of**(to reveal) PANURGE(an opera by Jules Massenet).
Answer: An example,some of a device used in the sea,the deep.