Unsuitable order for paint (5)
I believe the answer is:
inapt
'unsuitable' is the definition.
(I've seen this before)
'order for paint' is the wordplay.
'order for' indicates an anagram.
'paint' anagrammed gives 'INAPT'.
(Other definitions for inapt that I've seen before include "Not fitting" , "Not fit, unsuitable" , "Ill-suited" , "Far from fit" , "Useless" .)