Factory workers not working with complete ease (5,4)
I believe the answer is:
hands down
'with complete ease' is the definition.
(as in beating someone hands down)
'factory workers not working' is the wordplay.
'factory workers' becomes 'hands' (hand can mean a factory employee).
'not working' becomes 'down' (down can mean broken or not working).
'hands'+'down'='HANDS DOWN'
(Other definitions for hands down that I've seen before include "with ease" , "extremely easily" , "without effort" , "without difficulty" , "producing sentences?" .)