Saunter south with giant (6)
I believe the answer is:
stroll
'saunter' is the definition.
(I know that saunter can be written as stroll)
'south with giant' is the wordplay.
'south' becomes 'S' (abbreviation).
'with' says to put letters next to each other.
'giant' becomes 'troll' (I've seen this before).
's'+'troll'='STROLL'
(Other definitions for stroll that I've seen before include "Amble along" , "A pleasant and leisurely walk" , "A casual or lazy walk" , "Amble or ramble" , "Walk in a leisurely way" .)