Sticky substance brought over in drinking vessel (3)
I believe the answer is:
mug
'drinking vessel' is the definition.
(I know that mug is a type of drinking vessel)
'sticky substance brought over' is the wordplay.
'sticky substance' becomes 'gum' (gum can mean glue).
'brought over' says the letters should be written in reverse.
'gum' written backwards gives 'MUG'.
'in' acts as a link.
(Other definitions for mug that I've seen before include "Idiot" , "Drinking vessel, by gum" , "Drinking vessel; rob" , "Charlie" , "Drinking vessel for a chump" .)