Banner (4)
'banner' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for flag that I've seen before include "Iris - banner" , "Languish, decline" , "variety of plant" , "Lose spirit" , "Creamy-white" .)
(Other definitions for year that I've seen before include "One intake of undergrads" , "Orbital period" , "See 33 Across" , "See 9" , "One tenth of a decade" .)
'banner' is the definition.
(ensign is a type of flag)
This is all the clue.
(Other definitions for ensign that I've seen before include "Lowly ranked officer" , "Junior US naval officer" , "Soldier; standard" , "Ship's flag to show nationality" , "US naval rank" .)