Street residue is put away (5)
I believe the answer is:
stash
'is put away' is the definition.
(I've seen this in another clue)
'street residue' is the wordplay.
'street' becomes 'st' (abbreviation).
'residue' becomes 'ash' (ash is a kind of residue).
'st'+'ash'='STASH'
(Other definitions for stash that I've seen before include "collection" , "Squirrel away" , "Secret store (colloq.)" , "Hide (something) away" , "(Hidden store of) drugs" .)