Undistinguished vehicle? Wrong one (7)
I believe the answer is:
vanilla
'undistinguished vehicle? wrong one' is the definition.
I can't judge whether this defines the answer.
'vehicle? wrong one' is the wordplay.
'vehicle?' becomes 'van' (type of vehicle).
'wrong' becomes 'ill' (I've seen this in another clue).
'one' becomes 'a' (a thing is one thing).
'van'+'ill'+'a'='VANILLA'
Can you help me to learn more?
(Other definitions for vanilla that I've seen before include "plant" , "Orchid, its pod, bean for flavouring" , "Flavouring derived from an orchid" , "Flavour got from pods" , "Without any extras - all vain (anag)" .)