Crossword Genius

Vehicle in this style wanted by Scotsman, one in order? (10)

Ross

I believe the answer is:

carthusian

'one in order?' is the definition.
(Carthusians are an order of monks)

'vehicle in this style wanted by scotsman' is the wordplay.
'vehicle' becomes 'car' (car is a kind of vehicle).
'in this style' becomes 'thus'.
'wanted by' is a charade indicator (letters next to each other).
'scotsman' becomes 'ian'.
'car'+'thus'+'ian'='CARTHUSIAN'

I've seen this clue in The Times.
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