Gone wild over Villa referee claims (5)
I believe the answer is:
feral
'gone wild' is the definition.
(I've seen this in another clue)
'over villa referee claims' is the wordplay.
'over' is a reversal indicator.
'claims' indicates a hidden word (the answer is held or claimed within the clue).
'laref' is hidden within 'villa referee'.
'laref' reversed gives 'FERAL'.
(Other definitions for feral that I've seen before include "(Of an animal) running wild" , "Fierce, having reverted to wild state" , "Wild but originally domestic" , "Wild and menacing" , "Escaped-into-wild (animal)" .)