Eating place whence cutlery may be taken (7)

I believe the answer is:

canteen

I'm a little stuck... Click here to teach me more about this clue!

But I can't explain it at all! Could you help me understand?

(Other definitions for canteen that I've seen before include "Institutional eating place" , "Flask - restaurant attached to institution" , "eating-place?" , "water bottle?" , "Workers' restaurant" .)

Want a hint initially instead of a full solution? Install my app