Ministries on casual break (12)
I believe the answer is:
intermission
'break' is the definition.
(I know that break can be written as intermission)
'ministries on casual' is the wordplay.
'casual' indicates an anagram (a casual or disordered version of the letters).
'ministries'+'on'='ministrieson'
'ministrieson' with letters rearranged gives 'INTERMISSION'.
(Other definitions for intermission that I've seen before include "Theatre's half-time" , "Break; respite" , "Interval" , "Pause, break" , "Entr'acte" .)