Tacit, implied (8)
I believe the answer is:
unspoken
I believe this clue is a double definition.
'tacit' is the first definition.
(I've seen this before)
'implied' is the second definition.
(I've seen this in another clue)
(Other definitions for unspoken that I've seen before include "as text messaging is, for example" , "Not made explicit" , "Understood" , "Tacit" , "Not expressed" .)