Bloomer in parking: auntie crashed (7)
I believe the answer is:
petunia
'bloomer' is the definition.
(petunia is a kind of flowering plant)
'parking auntie crashed' is the wordplay.
'parking' becomes 'p' (abbreviation on road signs).
'crashed' indicates an anagram.
'auntie' anagrammed gives 'etunia'.
'p'+'etunia'='PETUNIA'
'in' is the link.
(Other definitions for petunia that I've seen before include "Flowering plant" , "Garden plant, originally from S. America" , "Plant cultivated for its white, pink, blue or purple funnel-shaped flowers" , "Common garden 13 across" , "Flower - tuna pie (anag)" .)