Spirit vital to embellish our ideas (5)
I believe the answer is:
houri
'spirit' is the definition.
(type of Islamic spirit)
'vital to embellish our ideas' is the wordplay.
'vital to' says the answer is hidden in the clue.
'HOURI' can be found hidden inside 'embellish our ideas'.
(Other definitions for houri that I've seen before include "Virgin companion of the Muslim faithful in Paradise" , "Paradisal nymph" , "Beautiful female" , "faithful female companion" , "Young beautiful woman of the Moslem Paradise" .)