Exclamation from a ham actor? (3)
I believe the answer is:
aha
'exclamation' is the definition.
(I have seen 'Exclamation of discovery ' mean 'aha' so perhaps 'exclamation' could also mean 'aha')
'a ham actor?' is the wordplay.
'ham actor?' becomes 'ha' (this might be a standard abbreviation which I don't know about).
'a'+'ha'='AHA'
'from' is the link.
Can you help me to learn more?
(Other definitions for aha that I've seen before include "Triumphant cry" , "Exclamation of triumph or surprise, a palindrome" , "it expresses surprise" , "I've got it!" , "I see!" .)