Republican admitted to charge, a provocateur (5)
I believe the answer is:
troll
'a provocateur' is the definition.
I can't judge whether this definition defines the answer.
'republican admitted to charge' is the wordplay.
'republican' becomes 'r' (abbreviation).
'admitted to' means one lot of letters goes inside another.
'charge' becomes 'toll' (toll is a kind of charge).
'r' put inside 'toll' is 'TROLL'.
Can you help me to learn more?
(Other definitions for troll that I've seen before include "ugly cave-dweller" , "Malignant elf" , "Monster - fish" , "Online annoyance" , "Fish - gnome - sing" .)