In the result, rather to an extreme degree (5)
I believe the answer is:
ultra
'in the result rather to an extreme degree' is the definition.
I can't judge whether this defines the answer.
'in the result rather to an' is the wordplay.
'in' says the answer is hidden in the clue.
'ULTRA' is hidden in the letters of 'result rather an'.
Can you help me to learn more?
(Other definitions for ultra that I've seen before include "Above, beyond, super" , "Project started at Bletchley Park in 1939 to break the Enigma code" , "Prefix meaning beyond or extremely" , "Extreme (as in UV)" , "Immoderate" .)