What removes stains from a table, a chair, etc? (6)
I believe the answer is:
bleach
'what removes stains' is the definition.
'from a table a chair etc?' is the wordplay.
'from' indicates a hidden word.
'BLEACH' is hidden within 'table a chair etc'.
(Other definitions for bleach that I've seen before include "Sterilising whitener" , "Agent that makes things white or colourless" , "Caustic material" , "Blanche" , "Whiten - disinfectant" .)