Venetian possibly has a cry about dead end (5,5)
I believe the answer is:
blind alley
'dead end' is the definition.
(synonyms)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for blind alley that I've seen before include "Cul-de-sac" , "dead-end position" , "no progress there" , "no escape route" .)