... in central Armagh provides a warning (5)
I believe the answer is:
alarm
'a warning' is the definition.
(I've seen this before)
'in central armagh provides' is the wordplay.
'in' indicates the answer is hidden within the clue.
'ALARM' is hidden within 'central armagh provides'.
(Other definitions for alarm that I've seen before include "Scare or worry" , "Frighten or startle" , "with which many awake to in the morning" , "Feeling of fear" , "Mild panic" .)