Big cat Guevara viewed with rising abhorrence (7)
I believe the answer is:
cheetah
'big cat' is the definition.
(cheetah is a kind of big cat)
'guevara viewed with rising abhorrence' is the wordplay.
'guevara' becomes 'che' (revolutionary Che Guevara).
'viewed with' is a charade indicator (letters next to each other).
'rising' says the letters should be written in reverse (going up in a down clue).
'abhorrence' becomes 'hate' (I've seen this in another clue).
'hate' written backwards gives 'etah'.
'che'+'etah'='CHEETAH'
(Other definitions for cheetah that I've seen before include "Long-legged feline" , "spotted in Africa" , "Swiftest mammal" , "Swift African cat" , "Fast cat - the ache (anag)" .)