Nominal trial developed about you in France (7)
I believe the answer is:
titular
'nominal' is the definition.
(I know that nominal can be written as titular)
'trial developed about you in france' is the wordplay.
'developed' indicates an anagram.
'about' is an insertion indicator.
'you in france' becomes 'tu' ('you' in French).
'trial' anagrammed gives 'tilar'.
'tilar' going around 'tu' is 'TITULAR'.
(Other definitions for titular that I've seen before include "So called" , "See" , "as figureheads" , "Having name of ruler but without real authority" , "Like certain churches" .)