Unspoken but implied (5)
I believe the answer is:
tacit
'unspoken but implied' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for tacit that I've seen before include "Unrecorded" , "Implied without being said" , "Unvoiced" , "Attic? (anag)" , "Unspoken but understood" .)