That's the spirit! (5)
(Other definitions for genie that I've seen before include "Goblin as found in Aladdin's lamp" , "Spirit with the power to grant wishes" , "Arabian goblin with strange powers" , "Magic spirit" , "Spirit in a bottle" .)
'that's the spirit' is the definition.
(spirit can mean a ghost)
This is the entire clue.
(Other definitions for ghost that I've seen before include "author for someone" , "someone without much presence" , "Spectre, wraith" , "Apparition; faint trace" , "Spirit of the dead" .)