Naked eye-opener on pole! (4)
I believe the answer is:
bare
'naked' is the definition.
('bare' can be a synonym of 'naked')
'eye-opener on pole' is the wordplay.
'opener' suggests taking the first letters.
'on' says to put letters next to each other.
'pole' becomes 'bar' (I've seen this before**).
The first letter of 'eye' is 'e'.
'e' put after 'bar' is 'BARE'.
(Other definitions for bare that I've seen before include "Expose" , "Uncovered - unfurnished - unadorned" , "State of deciduous tree in winter" , "Carried" , "Without protective covering" .)