Person yelling: "Great shot!" (8)
I believe the answer is:
screamer
'shot' is the definition.
(I have seen 'powerful shot' mean 'screamer' so perhaps 'shot' could also mean 'screamer')
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for screamer that I've seen before include "she'll give voice" , "powerful shot" , "South American bird with loud, harsh cry" , "Sensational newspaper headline - mere scar (anag)" , "express delivery" .)