Permit what diners do during cheese course? (8)

I believe the answer is:
passport
This might be a double definition.
'permit' is the first definition.
(passport is a type of permit)
'what diners do during cheese course?' is the second definition.
The definition suggests a singular noun which matches the answer.
Can you help me to learn more?
(Other definitions for passport that I've seen before include "Travel identification" , "one admits" , "that may gain acceptance" , "is the open sesame" , "Document allowing travel abroad" .)
