Firm foundation (13)
I believe the answer is:
establishment
I believe this clue is a double definition.
'firm' is the first definition.
(thesaurus)
'foundation' is the second definition.
(I've seen this before)
(Other definitions for establishment that I've seen before include "Action of setting up on a permanent basis" , "Permanent staff; business; household" , "Power-holding class" , "concern" , "Institutionalized authority" .)