Income level in Parisian's street (7)
I believe the answer is:
revenue
'income' is the definition.
(I know that revenue is a type of government income)
'level in parisian's street' is the wordplay.
'level' becomes 'even' (similar in meaning).
'in' is an insertion indicator.
'parisian's street' becomes 'rue' ('street' in French).
'even' placed within 'rue' is 'REVENUE'.
(Other definitions for revenue that I've seen before include "Earnings" , "profit" , "Government's income" , "Money received" , "Gross business income" .)