Leo's demented cry (3)
I believe the answer is:
ole
'cry' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'leo's demented' is the wordplay.
'demented' indicates an anagram.
'leo' is an anagram of 'OLE'.
Can you help me to learn more?
(Other definitions for ole that I've seen before include "Hooray in Spain" , "Well done! (Span.)" , "Spanish victory cry" , "Spanish shout of triumph" , "Hurrah in Spain" .)