Scream for the fifty quid (4)
I believe the answer is:
yell
'scream' is the definition.
(synonyms)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for yell that I've seen before include "Bawl, yowl" , "Call out" , "Shout - Shetland island" , "Shout loudly" , "Loud sharp cry" .)