Staple recipe colour (6)
I believe the answer is:
pastel
'colour' is the definition.
(I know that pastel is a type of colour)
'staple recipe' is the wordplay.
'recipe' indicates an anagram.
'staple' is an anagram of 'PASTEL'.
(Other definitions for pastel that I've seen before include "Type of crayon" , "Delicate colour found in plates" , "Delicate and pale in colour" , "Soft shade; crayon" , "Delicate shade; crayon" .)