Second best place to get off a bus? (4)
I believe the answer is:
stop
'place to get off a bus?' is the definition.
(bus stop)
'second best' is the wordplay.
'second' becomes 's' (common abbreviation).
'best' becomes 'top' (top can mean the very best).
's'+'top'='STOP'
(Other definitions for stop that I've seen before include "This watch is used to time races" , "set of organ pipes" , "It could be the organist's principal" , "Red light signal" , "high card in bridge" .)