It might be instant or subliminal (7)
I believe the answer is:
message
(Other definitions for message that I've seen before include "Tidings" , "Errand" , "Verbal or written communication" , "meaning" , "Missive" .)
I believe the answer is:
message
(Other definitions for message that I've seen before include "Tidings" , "Errand" , "Verbal or written communication" , "meaning" , "Missive" .)