Plot article on singer Chris (4)
I believe the answer is:
area
'plot' is the definition.
(I've seen this before)
'article on singer chris' is the wordplay.
'article' becomes 'a' (the indefinite article in English).
'on singer chris' becomes 'rea' (I can't justify this - if you can you should give a lot more credence to this answer).
'a'+'rea'='AREA'
Can you help me to learn more?
(Other definitions for area that I've seen before include "Speaking formally to (someone)" , "Part of a building, city etc" , "part of town" , "'Tract, region (4)'" , "Field -- expanse" .)