Feasible (8)
'feasible' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for possible that I've seen before include "Achievable, able to be done" , "Conceivable, practicable" , "Capable of happening" , "Conceivable, imaginable" , "Potential" .)
'feasible' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for practicable that I've seen before include "Feasible" , "useful" , "functional" .)