Place for father to hide heiress, with plot brewing (7,4)
I believe the answer is:
priests hole
'place for father to hide' is the definition.
(historical hiding place for a persecuted priest)
'heiress with plot brewing' is the wordplay.
'with' is a charade indicator (letters next to each other).
'brewing' indicates anagramming the letters.
'heiress' put after 'plot' is 'plotheiress'.
'plotheiress' is an anagram of 'PRIESTS HOLE'.
(Other definitions for priests hole that I've seen before include "Hideaway" , "Hiding place for clergy during times of religious persecution" .)