Model with Russian money problems (7)
I believe the answer is:
trouble
'problems' is the definition.
(I've seen this before)
'model with russian money' is the wordplay.
'model' becomes 'T' (Ford Model T car).
'with' is a charade indicator (letters next to each other).
'russian money' becomes 'rouble' (I've seen this before).
't'+'rouble'='TROUBLE'
(Other definitions for trouble that I've seen before include "To make the effort" , "Difficulty; cause distress to" , "Difficulty, care, worry" , "Hassle" , "Difficulty; public disorder" .)