Bronwen regularly invading my secret place (6)
I believe the answer is:
corner
'secret place' is the definition.
(thesaurus)
'bronwen regularly invading my' is the wordplay.
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
'invading' means one lot of letters goes inside another.
'my' becomes 'cor' (both are expressions of surprise).
The alternating letters of 'bronwen' are 'rne'.
'rne' placed within 'cor' is 'CORNER'.
(Other definitions for corner that I've seen before include "awkward situation" , "Angle; nook" , "Football kick; trap" , "Monopolise" , "Piece of bacon" .)