Method for evacuating Sydney Street repulsed me (6)
I believe the answer is:
system
'method' is the definition.
(I know that system is a type of method)
'evacuating sydney street repulsed me' is the wordplay.
'evacuating' suggests removing the centre (I've seen 'evacuated' mean this).
'street' becomes 'st' (abbreviation).
'repulsed' says the letters should be written backwards.
'sydney' with its middle removed is 'sy'.
'me' in reverse letter order is 'em'.
'sy'+'st'+'em'='SYSTEM'
'for' is the link.
(Other definitions for system that I've seen before include "Methodical procedure" , "Organised structure for arranging or classifying" , "Arrangement of units in a whole" , "Group of interrelated elements comprising a unified whole" , "The government" .)