In Germany we get faultless service (5)
I believe the answer is:
weser
'in germany' is the definition.
The definition suggests a singular noun which matches the answer.
'we get faultless service' is the wordplay.
'get' says to put letters next to each other.
'faultless service' becomes 'ser' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'we'+'ser'='WESER'
Can you help me to learn more?
(Other definitions for weser that I've seen before include "Er, sew up the German river" , "German runner" .)