Book a quiet room, again in foreign town (5-5)

'town' is the definition.
(I have seen 'German town' mean 'baden baden' so perhaps 'town' could also mean 'baden baden')

'book a quiet room again in foreign' is the wordplay.
I cannot quite see how this works, but
'book' could be 'b' and 'b' is found in the answer.
'a' is found in the answer.
'room' could be 'den' (den is a kind of room) and 'den' is found within the answer.
The remaining letters 'baden' is a valid word which might be clued in a way I don't understand.
This may be the basis of clue (or it may be nonsense).

Can you help me to learn more?