Work (4)
'work' is the definition.
(an opus is an artistic work)
This is all the clue.
(Other definitions for opus that I've seen before include "Musical piece" , "Showing creative skill" , "Composer's catalogue number" , "Work (mus.)" , "Artistic work" .)
'work' is the definition.
(I know that toil is a type of work)
This is all the clue.
(Other definitions for toil that I've seen before include "Work hard and long" , "Hard physical work" , "Work really hard" , "Work hard, labour" , "Work incessantly" .)
'work' is the definition.
(I know that work can be written as employment)
This is all the clue.
(Other definitions for employment that I've seen before include "Utilization" , "The utilisation of something" , "A person's work or profession" , "Paid work" .)
'work' is the definition.
(I know that work can be written as operate)
This is the entire clue.
(Other definitions for operate that I've seen before include "Control, run, a machine say" , "Work - perform surgery" , "Make to work" , "Perform surgery or run a machine" , "Cause to function" .)
'work' is the definition.
(labouring is a kind of working)
This is all the clue.
(Other definitions for labour that I've seen before include "Painful time" , "Workforce" , "End of term" , "unnecessarily elaborate" , "Donkey-work" .)
'work' is the definition.
(I know that trade is a type of endeavor)
This is all the clue.
(Other definitions for trade that I've seen before include "Give and receive (blows)" , "Customers" , "Deal commercially" , "Commercial exchange of goods and services" , "A skilled craft to earn living" .)
'work' is the definition.
(I know that labor is a type of work)
This is all the clue.
(Other definitions for ethic that I've seen before include "Moral practice" , "System of rules of behaviour" , "Principles accepted by a social group" , "Moral principle" , "System of principles" .)
'work' is the definition.
(both can mean to operate something)
This is all the clue.
(Other definitions for run that I've seen before include "Move at speed" , "Jog; manage" , "Manage, operate" , "Possibly an extra" , "work" .)
'work' is the definition.
(to ply a trade is to work at it)
This is all the clue.
(Other definitions for ply that I've seen before include "Strand, of wool or wood, say" , "Fold; thickness" , "Laminate thickness" , "Thickness of yarn and wood" , "'Persist in offering, liquor say (3)'" .)