Having skills (4)
I believe the answer is:
able
'having skills' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for able that I've seen before include "Having the skills and qualifications required" , "Having the necessary capacity (to do something)" , "As capable as a mariner" , "Competent and equipped" , "With the required capacities" .)