### Clue: Engineer, eh? So it's said (4)
### Answer: WATT 
 ### Explanation: Definition: Engineer
 **Homophone of**(… So it's said) "what?"(like "eh?" an expression asking for clarification of what was said, as "Eh?"/"What (did you just say)?".
Defn: Scottish mechanical …, after whom the unit of power was named.