Street name changed - that's a bit of a bloomer (6)
I believe the answer is:
stamen
'a bit of a bloomer' is the definition.
(I've seen this before)
'street name changed' is the wordplay.
'street' becomes 'st' (abbreviation).
'changed' is an anagram indicator.
'name' with letters rearranged gives 'amen'.
'st'+'amen'='STAMEN'
'that's' acts as a link.
(Other definitions for stamen that I've seen before include "Pollen-bearing part of a flower" , "Pollen-bearing organ of flowering plant" , "Pollen producer" , "Male fertilising organ of flowering plants" , "Fertiliser" .)