Interpret article in colour (4)
I believe the answer is:
read
'interpret' is the definition.
(I know that interpret can be written as read)
'article in colour' is the wordplay.
'article' becomes 'a' (the indefinite article in English).
'in' means one lot of letters goes inside another.
'colour' becomes 'red' (red is a kind of colour).
'a' put within 'red' is 'READ'.
(Other definitions for read that I've seen before include "See - peruse - understand" , "Stomach" , "Check, emend (proof)" , "Use a book" , "Study (subject at university)" .)