Street light is made to go off (5)
I believe the answer is:
stray
'go off' is the definition.
(I've seen this in another clue)
'street light' is the wordplay.
'street' becomes 'st' (abbreviation).
'light' becomes 'ray' (ray is a kind of light).
'st'+'ray'='STRAY'
'is made to' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for stray that I've seen before include "out of place" , "Wander off course" , "Appearing occasionally" , "Wander from the path" , "Drift - isolated" .)