Sits around in a car getting very high (9)
I believe the answer is:
altissimo
'very high' is the definition.
(musical term)
'sits around in a car' is the wordplay.
'around' indicates anagramming the letters.
'in' means one lot of letters goes inside another.
'car' becomes 'limo' (limo is a kind of car).
'sits' anagrammed gives 'tiss'.
'a'+'limo'='alimo'
'tiss' placed into 'alimo' is 'ALTISSIMO'.
'getting' is the link.
(Other definitions for altissimo that I've seen before include "Very highly placed" , "Very high musical pitch" , "Very highly pitched" , "one is almost dizzy" .)