Feeling ecstatic about money, grabbing fortune finally (8)
I believe the answer is:
sentient
'feeling' is the definition.
('sentient' can be a synonym of 'feeling')
'ecstatic about money grabbing fortune finally' is the wordplay.
'ecstatic' becomes 'sent' (I've seen this in other clues).
'about' is an insertion indicator.
'money' becomes 'tin' (I've seen this before).
'grabbing' indicates putting letters inside.
'finally' indicates one should take the final letters.
The final letter of 'fortune' is 'e'.
'tin' placed around 'e' is 'tien'.
'sent' going around 'tien' is 'SENTIENT'.
(Other definitions for sentient that I've seen before include "Conscious - aware" , "Feeling, conscious" , "Able to perceive or feel things" , "Having feelings" , "Capable of feeling things as in tenets" .)