Form of street canopy (6)
I believe the answer is:
tester
'canopy' is the definition.
(I've seen this before)
'form of street' is the wordplay.
'form of' indicates an anagram (the letters need to be in another 'form').
'street' is an anagram of 'TESTER'.
(Other definitions for tester that I've seen before include "A canopy over a large bed, or an examiner" , "One examining" , "covering at night" , "One trying out; canopy over bed" , "Old sixpence for a bed canopy" .)