Not modern, out of time, coming up dull (4)
I believe the answer is:
dead
I believe this clue is a quadruple definition!!
'not modern out' is the first definition.
'dead' can be an answer for 'out' (thesaurus). I'm not sure about the 'not modern' bit.
'of' acts as a link.
'time' is the second definition.
(thesaurus)
'coming' is a link.
'up' is the third definition.
Both the answer and definition are adjectives. Maybe you can see a link between them that I don't see?
'dull' is the fourth definition.
(I've seen this before)
Can you help me to learn more?
(Other definitions for dead that I've seen before include "Pushing up the daisies" , "No longer relevant" , "Deceased; numb" , "Not quick" , "Lookalike" .)