Adolescent is after food container in workplace eatery (7)
I believe the answer is:
canteen
'workplace eatery' is the definition.
(I've seen this before)
'adolescent is after food container' is the wordplay.
'adolescent' becomes 'teen' (I've seen this before).
'is after' says to put letters next to each other.
'food container' becomes 'can' (I've seen this before).
'teen' after 'can' is 'CANTEEN'.
'in' is the link.
(Other definitions for canteen that I've seen before include "Soldier's water-flask" , "University restaurant" , "Set of cutlery" , "Water container and works restaurant" , "Refectory" .)