Spite shown by male Wonderland visitor (6)
I believe the answer is:
malice
'spite' is the definition.
(synonyms)
'by male wonderland visitor' is the wordplay.
'by' is a charade indicator (letters next to each other).
'male' becomes 'm' (common abbreviation).
'wonderland visitor' becomes 'alice' (as in Lewis Carroll's Alice in Wonderland).
'm' put next to 'alice' is 'MALICE'.
'shown' is the link.
(Other definitions for malice that I've seen before include "Ill will, a desire to harm others" , "Spitefulness" , "Desire to harm others, may be aforethought" , "Spite - desire to hurt" , "'Ill-will, spite (6)'" .)