Bleach the article in question (6)
I believe the answer is:
whiten
'bleach' is the definition.
(I know that bleach is a is a more specific form of the action whiten)
'article in question' is the wordplay.
'article' becomes 'it' (I am not sure about this - if you are sure you should believe this answer much more).
'in' indicates putting letters inside.
'question' becomes 'when'.
'it' placed into 'when' is 'WHITEN'.
'the' is the link.
Can you help me to learn more?
(Other definitions for whiten that I've seen before include "Turn pale" , "Bleach" , "free from guilt" , "Blanch" , "Become less colourful" .)