Worker made of metal (5)
I believe the answer is:
robot
(Other definitions for robot that I've seen before include "Automation" , "Automatic worker?" , "Android, possibly" , "Mechanical man" , "performer lacking emotion" .)
I believe the answer is:
robot
(Other definitions for robot that I've seen before include "Automation" , "Automatic worker?" , "Android, possibly" , "Mechanical man" , "performer lacking emotion" .)