Cats to close unexpectedly (7)
I believe the answer is:
'cats' is the definition.
(ocelot is a kind of cat)
'to close unexpectedly' is the wordplay.
'unexpectedly' is an anagram indicator.
'toclose' anagrammed gives 'OCELOTS'.
(Other definitions for ocelots that I've seen before include "animals in the wild" , "Cats - cool set (anag)" , "Small leopards found in sole cot" , "Close to, oddly, the wildcats" .)