Republican collared by peace advocate is teed off, possibly (5)
I believe the answer is:
drove
'teed off possibly' is the definition.
I can't tell whether this definition defines the answer.
'republican collared by peace advocate' is the wordplay.
'republican' becomes 'R' (political abbreviation).
'collared by' means one lot of letters goes inside another (I've seen this in other clues).
'peace advocate' becomes 'dove' (I've seen this in another clue).
'r' going inside 'dove' is 'DROVE'.
'is' acts as a link.
Can you help me to learn more?
(Other definitions for drove that I've seen before include "Moving crowd" , "Motored; moving flock" , "Urged, flock on the move" , "Went by car" , "compelled to work excessively" .)