Report on woman's affair (7)
I believe the answer is:
shebang
'affair' is the definition.
('shebang' can informally refer to a matter or situ)
'report on woman's' is the wordplay.
'report' becomes 'bang' (I've seen this before).
'on' means one lot of letters go next to another.
'woman' becomes 'she'.
'bang' after 'she' is 'SHEBANG'.
(Other definitions for shebang that I've seen before include "Whole affair" , "The entire system" , "business" , "Entire operation" , "(Whole) kit and caboodle" .)