It may have a standing charge for motorists (3,4)
I believe the answer is:
car park
'it may have a standing charge for motorists' is the definition.
The definition suggests a singular noun which matches the answer.
This is all the clue.
Can you help me to learn more?
(Other definitions for car park that I've seen before include "of which many stories might be told" , "multistorey, for example - with 27d" , "Multi-storey building with bays" , "Place to leave vehicles" , "designated area" .)