Parking place occupied by black mini (4)
I believe the answer is:
baby
'mini' is the definition.
(thesaurus)
'parking place occupied by black' is the wordplay.
'parking place' becomes 'bay' (parking bay).
'occupied by' is an insertion indicator.
'black' becomes 'b' (as in pencil classifications).
'bay' placed around 'b' is 'BABY'.
(Other definitions for baby that I've seen before include "Lumbered, left holding this" , "Timid person; child" , "Pet project" , "Honey" , "Newly-born child" .)