A Parisian admitting a fight in the dark (7)
I believe the answer is:
unaware
'in the dark' is the definition.
(I've seen this before)
'a parisian admitting a fight' is the wordplay.
'a parisian' becomes 'une' ('a' in French).
'admitting' is an insertion indicator (admit can mean to welcome in or accept).
'fight' becomes 'war' (warring is a kind of fighting).
'a'+'war'='awar'
'une' going around 'awar' is 'UNAWARE'.
(Other definitions for unaware that I've seen before include "Ignorant - unacquainted" , "Not knowing (of a situation or fact)" , "Not realising" , "Heedless" , "Ignorant - unenlightened" .)