Volatile situation arising from money invested in Pott's fracture (7,4)
I believe the answer is:
trouble spot
'volatile situation' is the definition.
(volatile or problematic area)
'money invested in pott's fracture' is the wordplay.
'money' becomes 'roubles' (Russian money).
'invested in' is an insertion indicator.
'fracture' indicates anagramming the letters (I've seen 'fractured' mean this).
'pott' is an anagram of 'tpot'.
'roubles' inserted inside 'tpot' is 'TROUBLE SPOT'.
'arising from' is the link.
(Other definitions for trouble spot that I've seen before include "Where there's social unrest" , "Place where difficulties regularly occur" , "Regular site of conflict" , "dangerous area" .)