Forces to make wall-painting (6)
I believe the answer is:
fresco
'wall-painting' is the definition.
(I've seen this before)
'forces to make' is the wordplay.
'to make' indicates anagramming the letters.
'forces' anagrammed gives 'FRESCO'.
(Other definitions for fresco that I've seen before include "Mural painted on wet plaster" , "Work of art" , "Artistic work" , "Watercolour done on wet plaster" , "Method of painting on walls" .)