Use (5)
'use' is the definition.
(I know that use is a more specific form of exploit)
This is the entire clue.
(Other definitions for employ that I've seen before include "occupation" , "Give work to (someone)" , "Take on (staff)" , "Engage or hire for work" , "Give paid work to" .)
'use' is the definition.
(synonyms)
This is all the clue.
(Other definitions for wield that I've seen before include "Hold and use (a weapon or tool)" , "exercise" , "Use (weapon, authority)" , "Handle - manage" , "Brandish a weapon or exert power" .)
'use' is the definition.
(availing is a kind of using)
This is all the clue.
(Other definitions for avail that I've seen before include "Be of value to" , "Be of service to" , "Make use, take advantage" , "Use to one's advantage" , "(Of no) use or benefit" .)
'use' is the definition.
(I know that use can be written as consumption)
This is all the clue.
(Other definitions for consumption that I've seen before include "Eating" , "Wasting disease" , "See 7" , "Tuberculosis" , "disorder" .)