Bring round southern passage (4)
I believe the answer is:
sway
'bring round' is the definition.
(thesaurus)
'southern passage' is the wordplay.
'southern' becomes 's' (abbreviation).
'passage' becomes 'way' (I've seen this in other clues).
's'+'way'='SWAY'
(Other definitions for sway that I've seen before include "Rock, stagger" , "Move back and forth" , "Strong influence" , "Vacillate" , "Move gently" .)