Pure, bare (4)
I believe the answer is:
mere
I believe this clue is a double definition.
'pure' is the first definition.
(I've seen this before)
'bare' is the second definition.
(I know that bare can be written as mere)
(Other definitions for mere that I've seen before include "Insignificant" , "DDwater" , "Lake; Wiltshire town" , "Paltry" , "of no significance" .)