In Ireland, force a tedious person back (5)
I believe the answer is:
garda
'in ireland force' is the definition.
The definition suggests a singular noun which matches the answer.
'a tedious person back' is the wordplay.
'tedious person' becomes 'drag' (drag can mean a boring or tedious person).
'back' says the letters should be written in reverse.
'a'+'drag'='adrag'
'adrag' back-to-front is 'GARDA'.
Can you help me to learn more?
(Other definitions for garda that I've seen before include "Cop" , "Member of the police" , "Policeman of the Irish Republic" , "One of our police - what a drag" , "An Irish limb of the law" .)