Train European element in Parisian's street (7)
I believe the answer is:
retinue
'train' is the definition.
(people following someone in a procession)
'european element in parisian's street' is the wordplay.
I cannot quite understand how this works, but
'european' could be 'e' (abbreviation e.g. EU) and 'e' is found within the answer.
'element' could be 'tin' (tin is a kind of element) and 'tin' is found within the answer.
'street' could be 'rue' (I have seen 'French street ' mean 'rue' so perhaps 'street' could also mean 'rue') and 'rue' is found within the leftover letters.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for retinue that I've seen before include "Train; attendants" , "Personal staff" , "Suite - train" , "Cortege" , "Body of aides" .)