Meant but not said (5)
I believe the answer is:
tacit
'meant but not said' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for tacit that I've seen before include "Implied, not spoken" , "Attic? (anag)" , "Understood, not spoken or played" , "Unspoken but understood" , "Not said though understood" .)