Interjection supplied by lead characters in weird Hardball opera adaptation (4)
I believe the answer is:
whoa
'interjection supplied' is the definition.
I can't tell whether this defines the answer.
'lead characters in weird hardball opera adaptation' is the wordplay.
'lead characters in' says to take the initial letters.
The initial letters of 'weird hardball opera adaptation' is 'WHOA'.
'by' is the link.
Can you help me to learn more?
(Other definitions for whoa that I've seen before include "horsy expression?" , "Hold your horses!" , "Said to stop a horse" , "halt" , "Stop! - steady on!" .)