Work I say succeeded, going over fake (8)
I believe the answer is:
symphony
'work i' is the definition.
'symphony' can be an answer for 'work' (I have seen 'Orchestral work ' mean 'symphony' so perhaps 'work' could also mean 'symphony'). I'm not certain of the 'i' bit.
'succeeded going over fake' is the wordplay.
'succeeded going' becomes 'mys' (I can't justify this - if you can you should give a lot more credence to this answer).
'over' is a reversal indicator.
'fake' becomes 'phony' ('phony' can be a synonym of 'fake').
'mys' back-to-front is 'sym'.
'sym'+'phony'='SYMPHONY'
'say' is the link.
Can you help me to learn more?
(Other definitions for symphony that I've seen before include "Composition for an orchestra" , "See 5" , "Large orchestral work" , "Musical composition" , "piece of music" .)