Corrupt civil judge may ultimately travel in this (7)
I believe the answer is:
bentley
'travel in this' is the definition.
'corrupt civil judge may ultimately' is the wordplay.
'corrupt' becomes 'bent' (I've seen this before**).
'ultimately' says to take the final letters.
The last letters of 'civil judge may' are 'ley'.
'bent'+'ley'='BENTLEY'
(Other definitions for bentley that I've seen before include "Luxury car" , "Possibly vintage car" .)