First sign of parish notice about priest (5)
I believe the answer is:
padre
'priest' is the definition.
(Padre is an example)
'first sign of parish notice about' is the wordplay.
'first sign of' says to take the initial letters (I've seen 'first signs' mean this).
'notice' becomes 'ad'.
'about' becomes 're' (regarding).
The first letter of 'parish' is 'p'.
'p'+'ad'+'re'='PADRE'
(Other definitions for padre that I've seen before include "Army chaplain" , "Chaplain to armed forces" , "Father" , "Sky pilot (military slang)" , "Cleric" .)