He acted wildly having been defrauded (7)
I believe the answer is:
cheated
'defrauded' is the definition.
(cheat can mean to defraud)
'he acted wildly' is the wordplay.
'wildly' indicates an anagram.
'he'+'acted'='heacted'
'heacted' with letters rearranged gives 'CHEATED'.
'having been' acts as a link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for cheated that I've seen before include "Defeated through deceit" , "taken for a ride" , "Behaved dishonestly" , "stung" .)