Spray empty Miami street (4)
I believe the answer is:
mist
'spray' is the definition.
(I know that mist is a more specific form of the action spray)
'empty miami street' is the wordplay.
'empty' says to hollow out the word (remove centre letters).
'street' becomes 'st' (abbreviation).
'miami' with its middle removed is 'mi'.
'mi'+'st'='MIST'
(Other definitions for mist that I've seen before include "Watery vapour" , "Haze" , "Watery film" , "Mizzle; light rain" , "low-level cloud" .)