On such a fine night, keep out of the car (6)
I believe the answer is:
starry
'on such a fine night' is the definition.
I know that 'night' relates to this answer.
'keep out of the car' is the wordplay.
'keep' becomes 'stay' (I've seen this in another clue).
'out of' is an insertion indicator (some letters on the outside of others).
'the car' becomes 'RR' (Rolls Royce).
'stay' going around 'rr' is 'STARRY'.
Can you help me to learn more?
(Other definitions for starry that I've seen before include "It describes the sky on a cloudless night" , "Shining brightly" , "Stellate" , "like Hollywood Boulevard?" , "Heavenly" .)