Feminine bras Katherine concealed in US state (8)
I believe the answer is:
nebraska
'us state' is the definition.
(I've seen this before)
'feminine bras katherine concealed' is the wordplay.
'concealed' says the answer is hidden in the clue.
'NEBRASKA' is hidden in the letters of 'feminine bras katherine'.
'in' is the link.
(Other definitions for nebraska that I've seen before include "Where Lincoln found" , "Cornhusker State" , "US Midwest state" , "State N. of Kansas" , "State of central US" .)