Clear speech launches ritual action (12)
I believe the answer is:
articulation
'clear speech' is the definition.
(articulating speech clearly)
'launches ritual action' is the wordplay.
'launches' indicates anagramming the letters (letters thrown or launched around).
'ritual'+'action'='ritualaction'
'ritualaction' is an anagram of 'ARTICULATION'.
(Other definitions for articulation that I've seen before include "Clarity in speech" , "clear diction" , "delivery" .)