One who's rapt the revolution is half over (5)
I believe the answer is:
lover
'one who's rapt the' is the definition.
I can't judge whether this definition defines the answer.
'revolution is half over' is the wordplay.
'is half' suggests halving the letters.
'over' shows that the letters should be reversed in order.
'revolution' with half the letters taken is 'revol'.
'revol' in reverse letter order is 'LOVER'.
Can you help me to learn more?
(Other definitions for lover that I've seen before include "One of a couple" , "admirer" , "Boyfriend" , "One enjoys" , "He really likes" .)