Vehicle travelling east (not south) or west (3-6)
I believe the answer is:
two-seater
'vehicle' is the definition.
(I've seen this before)
'travelling east not south or west' is the wordplay.
'travelling' is an anagram indicator.
'not' is a deletion indicator.
'south' becomes 'S' (abbreviation).
'or'+'west'='orwest'
'orwest' with 's' taken out is 'orwet'.
'east'+'orwet'='eastorwet'
'eastorwet' with letters rearranged gives 'TWO-SEATER'.
(Other definitions for two-seater that I've seen before include "Small car" , "Sports car" .)