Second fee securing Republican's easy victory (6)
I believe the answer is:
stroll
'easy victory' is the definition.
(stroll can mean an easy victory)
'second fee securing republican's' is the wordplay.
'second' becomes 's' (common abbreviation).
'fee' becomes 'toll' (toll is a kind of fee).
'securing' indicates putting letters inside.
'republican' becomes 'r' (abbreviation).
'toll' enclosing 'r' is 'troll'.
's'+'troll'='STROLL'
(Other definitions for stroll that I've seen before include "cinch" , "A pleasant and leisurely walk" , "Promenade" , "A casual, relaxing walk" , "Walk casually" .)