1960s group making entrances (5)
I believe the answer is:
doors
I believe this is a double definition.
'1960s group' is the first definition.
(The Doors)
'entrances' is the second definition.
(door is a kind of entrance)
'making' acts as a link.
(Other definitions for doors that I've seen before include "Portals" , "Entrance barriers" , "Ways in and out" , "Barriers to entrances" , "Openings" .)