Snakes like pythons not content (4)
I believe the answer is:
asps
'snakes' is the definition.
(asp is a kind of snake)
'like pythons not content' is the wordplay.
I cannot really understand how this works, but
'like' could be 'as' and 'as' is found in the answer.
'content' could be 'ps' (PS is an example) and 'ps' is found in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for asps that I've seen before include "native Africans?" , "Pass around the snakes" , "Small vipers" , "Deadly snakes" , "Small venomous snakes" .)