Hooded killers (6)

I believe the answer is:

cobras

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'killers' is the definition.
The answer and definition can be both animals as well as being plural nouns.
Maybe they are linked in a way I don't understand?

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for cobras that I've seen before include "Venomous tropical snakes" , "Venomous creatures" , "Slippery creatures" , "Carobs for the reptiles" , "Hooded snakes" .)

I've seen this clue in The Irish News.

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