Incompetent (5)
'incompetent' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for unfit that I've seen before include "Ill-equipped" , "Not healthy" , "In bad physical condition" , "Not in good physical shape (5)" , "Inapt" .)
'incompetent' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for inept that I've seen before include "Amateurish" , "lacks skill" , "Clumsy, bumbling" , "Clumsy, out of place" , "Silly - unskilled - unsuitable" .)
'incompetent' is the definition.
(I know that incompetent can be written as incapable)
This is the entire clue.
(Other definitions for incapable that I've seen before include "Useless" , "lacking ability" , "Unable, incompetent" , "Hopelessly drunk; incompetent" , "See possibly drunken" .)
'incompetent' is the definition.
(useless can mean incompetent or ineffective)
This is all the clue.
(Other definitions for useless that I've seen before include "Is Sue less impractical?" , "Of no benefit" , "Without purpose" , "Not worth a jot" , "Of no practical application, not worth keeping" .)