Paddy is moderate (6)
I believe the answer is:
temper
I believe this is a double definition.
'paddy' is the first definition.
(I've seen this in other clues)
'is moderate' is the second definition.
(I've seen this in another clue)
(Other definitions for temper that I've seen before include "Moderate; ill humour" , "(Calm or furious) disposition" , "Mood (often bad)" , "Irritability" , "Modify" .)