Scotsman, tipsy, riding moon vehicle (10)
I believe the answer is:
highlander
'scotsman' is the definition.
(I know that Highlander is a type of scotsman)
'tipsy riding moon vehicle' is the wordplay.
'tipsy' becomes 'high' (I've seen this in another clue).
'riding moon vehicle' becomes 'lander' (I am not sure about this - if you are sure you should believe this answer much more).
'high'+'lander'='HIGHLANDER'
Can you help me to learn more?
(Other definitions for highlander that I've seen before include "Scot, possibly" , "regimental soldier" , "Clansperson" , "man coming from table" , "Flora Macdonald, perhaps" .)