Upstart parking on street almost grabbing king (7)
I believe the answer is:
parvenu
'upstart' is the definition.
(I know that upstart can be written as parvenu)
'parking on street almost grabbing king' is the wordplay.
I cannot really understand how this works, but
'parking' could be 'p' (abbreviation on road signs) and 'p' is found within the answer.
'king' could be 'r' (abbreviation for rex, king in Latin) and 'r' is found in the answer.
'street' could be 'ave' (short for avenue) and 'ave' is found in the leftover letters.
The remaining letters 'nu' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for parvenu that I've seen before include "One who climbs" , "An upstart, new arrival to society" , "One coming" , "Newcomer" , "Nouveau riche" .)