Demolish stable and flat (5)
I believe the answer is:
level
I believe this clue is a triple definition!
'demolish' is the first definition.
(I've seen this in another clue)
'stable' is the second definition.
(thesaurus)
'and' is a link.
'flat' is the third definition.
(I know that flat can be written as level)
(Other definitions for level that I've seen before include "Staying at same height" , "status" , "Floor; horizontal" , "Even; a plane" , "Flush" .)