Hear about girl in leather factory (7)
I believe the answer is:
tannery
'leather factory' is the definition.
(I've seen this before)
'hear about girl' is the wordplay.
'hear' becomes 'try' ('try' can be a synonym of 'hear').
'about' means one lot of letters goes inside another.
'girl' becomes 'anne' (**).
'try' enclosing 'anne' is 'TANNERY'.
'in' acts as a link.
(Other definitions for tannery that I've seen before include "Building involved in making leather" , "where hides are treated" , "Leather works" , "Leather factory" , "place for skin treatment" .)