Lift to reveal bust? (8)
I believe the answer is:
elevator
'lift' is the definition.
('elevator' can be a synonym of 'lift')
'to reveal bust?' is the wordplay.
'bust?' indicates an anagram (I've seen 'bust' mean this).
'to'+'reveal'='toreveal'
'toreveal' is an anagram of 'ELEVATOR'.
(Other definitions for elevator that I've seen before include "it's uplifting" , "Gentle caress" , "Farm herd" , "North American lift" , "Cage that is raised and lowered mechanically in a vertical shaft" .)