Spirit in bottle in Egypt arising (5)
I believe the answer is:
'spirit' is the definition.
(genie is a kind of spirit)
'in bottle in egypt arising' is the wordplay.
'in' says the answer is hidden in the clue.
'arising' is a reversal indicator.
'eineg' can be found hidden inside 'bottle in egypt'.
'eineg' in reverse letter order is 'GENIE'.
(Other definitions for genie that I've seen before include "Arabian goblin with strange powers", "One in Aladdin's lamp", "Magician residing in a lamp", "In Arabian Nights, a magic goblin", "Bottled spirit?".)