Fair amount of omen from spirit is ultimately false or it's a powerful source for movement? (6)
I believe the answer is:
engine
'fair amount of omen' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'spirit is ultimately false or it's a powerful source for movement?' is the wordplay.
I cannot quite understand how this works, but
'spirit' could be 'gin' (I've seen this before) and 'gin' is present in the answer.
'it' could be 'e' ('e' can mean 'electronic' which is similar to 'IT') and 'e' is found within the answer.
The remaining letters 'ne' is a valid word which might be clued in a way I don't understand.
This may be the basis of clue (or it may be nonsense).
'from' is the link.
Can you help me to learn more?
(Other definitions for engine that I've seen before include "Machine supplying power" , "Motor" , "Locomotive" , "Motive machine" , "Machine converting energy into motion" .)