Oral, noxious drug container (4)
I believe the answer is:
vial
'drug container' is the definition.
'vial' can be an answer for 'container' (vial is a kind of container). I'm unsure of the 'drug' bit.
'oral noxious' is the wordplay.
'oral' shows a homophone (sound like) (how it sounds when spoken).
'noxious' becomes 'vile' (I've seen this before).
'vile' sounds like 'VIAL'.
Can you help me to learn more?
(Other definitions for vial that I've seen before include "Small medicine bottle" , "Ampoule" , "Small glass container" , "Not much bottle" , "Bottle that contains a drug" .)