Involves a silent order (7)
I believe the answer is:
entails
'involves' is the definition.
(I've seen this before)
'a silent order' is the wordplay.
'order' indicates anagramming the letters.
'a'+'silent'='asilent'
'asilent' with letters rearranged gives 'ENTAILS'.
(Other definitions for entails that I've seen before include "Involves, makes necessary" , "limits of will" , "Necessitates" , "Has as a direct consequence" , "Has as a logical consequence" .)