Backstreet seen through small eyes (5)
I believe the answer is:
alley
'backstreet' is the definition.
(I've seen this in another clue)
'through small eyes' is the wordplay.
'through' says the answer is hidden in the clue.
'ALLEY' can be found hidden inside 'small eyes'.
'seen' is the link.
(Other definitions for alley that I've seen before include "garden path" , "Narrow passage" , "Passage between houses, perhaps" , "Back lane" , "Narrow passageway" .)