Servant more exposed, we hear (6)
I believe the answer is:
bearer
'servant' is the definition.
(I've seen this before)
'more exposed we hear' is the wordplay.
'more exposed' becomes 'barer' (I've seen this in another clue).
'we hear' indicates a 'sounds like' (homophone) clue.
'barer' sounds like 'BEARER'.
(Other definitions for bearer that I've seen before include "One who carries, maybe a coffin" , "native servant" , "One who puts up with" , "He presents bill" , "One who helps to carry something - maybe news" .)