Tribute should be arriving now (3)
I believe the answer is:
due
This might be a double definition.
'tribute' is the first definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.
'arriving now' is the second definition.
Both the definition and answer are adverbs. Maybe they are linked in a way I don't understand?
'should be' acts as a link.
Can you help me to learn more?
(Other definitions for due that I've seen before include "Owed, or payable immediately" , "Deserved or unpaid" , "...more than one there [ROME]" , "Outstanding" , "Expected, scheduled" .)