Devise cover for access point (5)
I believe the answer is:
hatch
I believe this clue is a triple definition!
'devise' is the first definition.
(as in hatching a plan)
'cover' is the second definition.
(synonyms)
'for' acts as a link.
'access point' is the third definition.
(eg a kitchen hatch, access to a kitchen)
(Other definitions for hatch that I've seen before include "Emerge from egg - opening" , "Opening in floor or wall" , "Come up with" , "Of young bird or fish, emerge from egg" , "Movable cover on ship's deck - batten it down" .)