Soft colour of broken plates (6)
I believe the answer is:
pastel
'soft colour' is the definition.
(I've seen this before)
'broken plates' is the wordplay.
'broken' indicates anagramming the letters.
'plates' anagrammed gives 'PASTEL'.
'of' acts as a link.
(Other definitions for pastel that I've seen before include "Crayon - of soft shades" , "Staple light colour" , "Delicate shade; crayon" , "Delicate and pale in colour" , "art work" .)