Broken (5)
'broken' is the definition.
(bust can mean broken)
This is the entire clue.
(Other definitions for bust that I've seen before include "Head-and-shoulders piece" , "8 across" , "Piece of sculpture - broken!" , "Houdon's Voltaire" , "Small statue" .)
'broken' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for kaput that I've seen before include "Broken and useless" , "not 10 [IN ORDER]" , "Bust" , "Broken, put out of use" , "Completely broken down" .)
(Other definitions for arrow that I've seen before include "Pointed projectile" , "Direction pointer" , "Weapon from bow" , "Direction indicator" , "Mark to indicate direction" .)
(Other definitions for inoperable that I've seen before include "Not curable by surgery" , "Incapable of being made to work" .)