Night in Paris covered by some payment (7)
I believe the answer is:
annuity
'payment' is the definition.
(I know that annuity is a type of regular payment)
'night in paris covered by some' is the wordplay.
'night in paris' becomes 'nuit' ('night' in French).
'covered by' indicates putting letters inside.
'some' becomes 'any' (similar in meaning).
'nuit' put inside 'any' is 'ANNUITY'.
(Other definitions for annuity that I've seen before include "Regular income from a fund" , "Yearly payment" , "Pension income" , "regular payment" , "Form of investment" .)