Feudal worker comes back, taking care of painting (6)
I believe the answer is:
fresco
'painting' is the definition.
(I know that Fresco is a type of painting)
'feudal worker comes back taking care of' is the wordplay.
'feudal worker' becomes 'serf' (I've seen this in another clue).
'comes back' shows that the letters should be reversed in order.
'taking' says to put letters next to each other.
'care of' becomes 'co' (c/o can mean 'care of' when addressing mail).
'serf' in reverse letter order is 'fres'.
'fres'+'co'='FRESCO'
(Other definitions for fresco that I've seen before include "Picture painted on wall or ceiling before plaster is dry" , "Wall-painting" , "Method of painting on walls" , "Mural painted on wet plaster" , "Painting style" .)