Left one timid person squeezing in vehicle (9)
I believe the answer is:
limousine
'vehicle' is the definition.
(limousine is a kind of vehicle)
'left one timid person squeezing in' is the wordplay.
'left one' becomes 'li' (left abbreviation plus 1).
'timid person' becomes 'mouse'.
'squeezing' means one lot of letters goes inside another (squeeze can mean hug or embrace).
'mouse' placed around 'in' is 'mousine'.
'li'+'mousine'='LIMOUSINE'
(Other definitions for limousine that I've seen before include "Luxury car" , "Form of transport" , "Luxurious car (with a chauffeur?)" , "big car" , "vehicle" .)