Inconstant (7)
'inconstant' is the definition.
(associated in meaning)
This is the entire clue.
(Other definitions for variable that I've seen before include "Unsteady" , "can be changed" , "Liable to change" , "Prone to change" , "Not consistent, without a fixed pattern" .)
'inconstant' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for fickle that I've seen before include "Inconstant, changeable" , "Unreliable" , "Prone to shifting loyalties" , "Subject to changes of mind" , "Often changing, not constant or loyal" .)
'inconstant' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for mutable that I've seen before include "Inconsistent" , "not being fixed" , "Changeable" , "not stuck down" , "It might change!" .)