Entrance German goddess (4)
I believe the answer is:
gate
'entrance' is the definition.
(type of entrance)
'german goddess' is the wordplay.
'german' becomes 'g' (abbreviation).
'goddess' becomes 'ate' (Greek goddess of mischief).
'g'+'ate'='GATE'
(Other definitions for gate that I've seen before include "Number attending" , "Entry to arena" , "Means of entry" , "Facility in airport" , "Access here" .)