Right or means of entry (6)
I believe the answer is:
access
This clue is a double definition.
'right' is the first definition.
(access is a kind of right)
'means of entry' is the second definition.
(I've seen this before)
(Other definitions for access that I've seen before include "Way of entering or leaving" , "Means of entry, passage" , "Admission" , "Means of entering, way in" , "Way in, means of approach" .)