Crossword Genius

Refreshment place with a certain amount of cutlery (7)

Ross

I believe the answer is:

canteen

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'refreshment place with a certain' is the definition.
I can't judge whether this defines the answer.

'amount of cutlery' is the wordplay.
'amount' becomes 'can' (can is a kind of amount).
'of cutlery' becomes 'teen' (I can't justify this - if you can you should believe this answer much more).
'can'+'teen'='CANTEEN'

Can you help me to learn more?

(Other definitions for canteen that I've seen before include "NAAFI" , "Refectory" , "Soldier's water-flask" , "Works'' restaurant - cutlery" , "Box containing cutlery" .)

I've seen this clue in the Evening Standard.
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