Moderate's consumed with rage (9)
I believe the answer is:
temperate
'moderate's' is the definition.
(similar in meaning)
'consumed with rage' is the wordplay.
'consumed' becomes 'ate' (to eat is to consume food).
'with' is a charade indicator (letters next to each other).
'rage' becomes 'temper' (temper means anger or rage).
'ate' after 'temper' is 'TEMPERATE'.
(Other definitions for temperate that I've seen before include "Continent" , "Restrained" , "With mild climate" , "Showing self-restraint" , "Moderate, mild" .)