### Clue: Old slaver that is off isle with hand on board (5)
### Answer: SPAWL 
 ### Explanation: Definition: Old slaver
(i)**SL**(e) (i.e. ("that is") *off* ISLE) *with* **PAW** ("hand") *on board* 
Spawl is an archaic term for spittle or saliva, so "old slaver"