Confused about European banker's small car (5-7)
I believe the answer is:
three-wheeler
'small car' is the definition.
The definition suggests a singular noun which matches the answer.
'confused about european banker's' is the wordplay.
I cannot quite understand how this works, but
'about' could be 're' (regarding) and 're' is found in the answer.
'european' could be 'e' (abbreviation e.g. EU) and 'e' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for three-wheeler that I've seen is " Reliant Robin, say".)