Be functional (4)
I believe the answer is:
work
(Other definitions for work that I've seen before include "Put in effort" , "Monotonous song" , "Tasks to be undertaken" , ". . . get on with serious business" , "Labour" .)
I believe the answer is:
work
(Other definitions for work that I've seen before include "Put in effort" , "Monotonous song" , "Tasks to be undertaken" , ". . . get on with serious business" , "Labour" .)