Ability (10)
There are a few possibilities for this:
competence
'ability' is the definition.
(I know that craft is a type of astuteness)
This is all the clue.
(Other definitions for craft that I've seen before include "Vehicle for water or air" , "packet!" , "Skill in making things by hand" , "Boat, artifice or skills" , "Skill, cunning" .)
(Other definitions for skill that I've seen before include "Ability - dexterity" , "Craft; dexterity" , "Prowess" , "Talent" , "Knack" .)
'ability' is the definition.
(I know that competence is a type of skill)
This is the entire clue.
(Other definitions for competence that I've seen before include "Fitness, suitability" , "State of ability" , "Ability; adequate income" , "authority" , "Efficiency; legal power" .)