Stick around small container (5)
I believe the answer is:
flask
'container' is the definition.
(flask is a kind of container)
'stick around small' is the wordplay.
'stick' becomes 'flak' (I've seen this before).
'around' indicates putting letters inside.
'small' becomes 's' (abbreviation - e.g. clothes size).
'flak' placed around 's' is 'FLASK'.
(Other definitions for flask that I've seen before include "Container for liquids" , "Small pocket bottle" , "Portable drink container" , "Glass container" .)