The most common and most likely answer to this crossword clue is the 5 letter word COBRA
C
O
B
R
A
More clues leading to the result COBRA
- Jacob rashly holding something poisonous
- Emergency committee needs firm support
- Government emergency committee’s firm supporter?
- Horse runs over a dangerous snake
- Firm female garment, one with hood
- British company first gets soldiers Indian beer
- Firm female support for lethal Asian striker
- Emergency committee required for venomous snake
- Firm support for reptile
- Snake artist follows horse
Buddy explains!

The straight part
We know that "dangerous reptile" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case dangerous reptile = cobra.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does COBRA mean?
COBRA noun- Any of various venomous snakes of the family Elapidae.