Carriage German mayor ordered originally turned up (6)
I believe the answer is:
Here is my best explanation:
'carriage' is the definition.
(hansom is a kind of carriage)
'german mayor ordered originally turned up' is the subsidiary indication.
'german' becomes 'hans' (I've seen this in other clues**).
'originally' suggests taking the first letters.
'turned up' shows that the letters should be reversed in order.
The initial letters of 'mayor ordered' is 'mo'.
'mo' back-to-front is 'om'.
(Other definitions for hansom that I've seen before include "transport from the old days", "One-horse cab", "Horse-drawn cab", "Type of cab", "Two-wheeled horse-drawn covered carriage", "Old horse cab sounds attractive", "Transport", "Two-wheeled one-horse carriage", "Cab" and "Carriage".)