### Clue: Cunning, finding time to supplant king in vessel (3)
### Answer: ART 
 ### Explanation: Definition: Cunning
 "t"(abbrev. for "time") **replacing**(to supplant) "k"(abbrev. for "king" in chess notation) in "ark"(a vessel, like the one built by the biblical Noah).
Defn: …, as a noun.