Plasterwork (6)
I believe the answer is:
stucco
'plasterwork' is the definition.
(I have seen 'Decorative plasterwork ' mean 'stucco' so perhaps 'plasterwork' could also mean 'stucco')
This is all the clue.
(Other definitions for stucco that I've seen before include "Fine plaster for ornamenting walls etc" , "Fine plaster used on wall surfaces" , "Coating material" , "Plaster for coating outside walls" , "Kind of plaster used for wall decoration" .)