Predictable contest named after Ferrari icon? (3-5,4)
I believe the answer is:
'named after ferrari icon?' is the definition.
I don't know anything about this answer so I cannot tell whether this works.
'predictable contest' is the wordplay.
'predictable' becomes 'onehorse' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'contest' becomes 'race' (race is a kind of contest).
(Other definitions for one-horse race that I've seen before include "Competition in which a particular entrant is certain to win" , "it offers little competition" .)