Affair produced by female hairstyle? (7)
I believe the answer is:
shebang
'affair' is the definition.
('shebang' can informally refer to a matter or situ)
'by female hairstyle?' is the wordplay.
'by' means one lot of letters go next to another.
'female' becomes 'she' (I've seen this before).
'hairstyle?' becomes 'bang' (bang is a kind of hairstyle).
'she' next to 'bang' is 'SHEBANG'.
'produced' acts as a link.
(Other definitions for shebang that I've seen before include "business" , "The entire system" , "The whole thing?" , "Matter" , "circumstances" .)