Heed silent arrangement (6)
I believe the answer is:
listen
'heed' is the definition.
(I know that heed can be written as listen)
'silent arrangement' is the wordplay.
'arrangement' indicates anagramming the letters.
'silent' with letters rearranged gives 'LISTEN'.
(Other definitions for listen that I've seen before include "Give ear (to)" , "Try to hear (something)" , "Lend an ear (6)" , "Pay attention and hear" , "Take heed -- 13 (anag)" .)