One coming to a stop at the entrance? (4)
I believe the answer is:
door
'the entrance?' is the definition.
(door is a kind of entrance)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for door that I've seen before include "Swinging barrier" , "place of entry" , "Portal" , "Entrance way" , "Entry point" .)