Chore mixing paint? (5)
I believe the answer is:
ochre
'paint?' is the definition.
(ochre is a paint pigment)
'chore mixing' is the wordplay.
'mixing' is an anagram indicator.
'chore' is an anagram of 'OCHRE'.
(Other definitions for ochre that I've seen before include "An orangey pigment" , "Earth coloured pigment" , "Money" , "Orange" , "Chore using pale brownish colour (5)" .)