Remain a year on street (4)
I believe the answer is:
stay
'remain' is the definition.
(synonyms)
'a year on street' is the wordplay.
'year' becomes 'y'.
'on' is a charade indicator (letters next to each other).
'street' becomes 'st' (abbreviation).
'a'+'y'='ay'
'ay' put after 'st' is 'STAY'.
(Other definitions for stay that I've seen before include "hang about" , "Visit (for the night)" , "Supporting rope or wire" , "Delay (execution)" , "Defer" .)