Obstruct everybody on street (5)
I believe the answer is:
stall
'obstruct' is the definition.
(thesaurus)
'everybody on street' is the wordplay.
'everybody' becomes 'all' (all people).
'on' means one lot of letters go next to another.
'street' becomes 'st' (abbreviation).
'all' put after 'st' is 'STALL'.
(Other definitions for stall that I've seen before include "Hedge" , "Temporise; sales booth" , "Delay - booth for selling goods" , "Play for time" , "A stand in a market-place" .)