Lethal venom bottles split into two (5)
I believe the answer is:
halve
'split into two' is the definition.
Although both the answer and definition are verbs in their base form, I cannot see how they can define each other.
'lethal venom bottles' is the wordplay.
'bottles' indicates the answer is hidden within the clue (bottling is a kind of containing).
'HALVE' can be found hidden inside 'lethal venom'.
Can you help me to learn more?
(Other definitions for halve that I've seen before include "Bisect" , "make 10 5 say?" , "Reduce by 50%" , "Divide into two equal pieces" , "Divide equally between two" .)