Lifting device (7)
'lifting device' is the definition.
(derrick is a kind of lifting device)
This is all the clue.
(Other definitions for derrick that I've seen before include "Lifting device" , "Oil well framework" , "Tower over a borehole" , "boy" , "Kind of crane" .)
'lifting device' is the definition.
(crane is a kind of lifting device)
This is the entire clue.
(Other definitions for crane that I've seen before include "Device for picking up" , "Lifting structure" , "Lifter; bird" , "Bird; hoister" , "Long-necked wading bird and lifting machine" .)
'lifting device' is the definition.
(winch is a kind of lifting device)
This is the entire clue.
(Other definitions for winch that I've seen before include "Pull up" , "Hauling/lifting device" , "Hoisting machine" , "Hoist" , "Crank" .)