Snake dance from Brazil with a different beginning (5)
I believe the answer is:
mamba
'snake' is the definition.
(mamba is a kind of snake)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for mamba that I've seen before include "Poisonous creature" , "Large African snake" , "It may be deadly" , "Venomous African tree snake" , "Venomous snake; rhymes with dance" .)