Today (3)
'today' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for now that I've seen before include "straight away" , "Today" , "Immediately" , "At this moment in time" , "At the present time" .)
(Other definitions for usa that I've seen before include "A great national federation" , "Briefly, a great federation" , "country" , "Initially, a great federation" , "Union" .)
'today' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for christmas eve that I've seen before include "today" , "Time to hang up stockings" , "Twenty fourth of December" , "Seventeen days ago" , "December 24th" .)