Type of light half of street order (6)
I believe the answer is:
strobe
'type of light' is the definition.
(I've seen this in another clue)
'half of street order' is the wordplay.
'half of' indicates taking half.
'order' becomes 'obe' (Order of the British Empire award).
'street' cut in half is 'str'.
'str'+'obe'='STROBE'
(Other definitions for strobe that I've seen before include "something flashy" , "Sorbet (anag) -flashing light" , "Flashing-light device" , "Light that seems to spin" , "Flashy type" .)