Extreme result Raymond includes (5)
I believe the answer is:
ultra
'extreme' is the definition.
(I've seen this before)
'result raymond includes' is the wordplay.
'includes' indicates a hidden word.
'ULTRA' is hidden in the letters of 'result raymond'.
(Other definitions for ultra that I've seen before include "Prefix meaning excessively or extremely" , "Above, beyond, super" , "(As prefix) beyond or extreme" , "Person holding extreme views" , "holding extreme position" .)