Bistro gets artist decanter (6)
I believe the answer is:
carafe
'decanter' is the definition.
(I know that decanter can be written as carafe)
'bistro gets artist' is the wordplay.
'bistro' becomes 'cafe' (I've seen this in another clue).
'gets' indicates putting letters inside (gets can mean captures or absorbs).
'artist' becomes 'RA' (Royal Academician, member of Royal Academy of Arts).
'cafe' going around 'ra' is 'CARAFE'.
(Other definitions for carafe that I've seen before include "Wine, water, jug" , "Open-topped glass flask" , "Glass bottle for serving wine at table" , "Wine server" , "Decanter" .)