Decline of Romans again? (3)
I believe the answer is:
sag
'decline' is the definition.
(sag can mean to decline or droop)
'of romans again?' is the wordplay.
'of' indicates the answer is hidden within the clue.
'SAG' is hidden within 'romans again'.
(Other definitions for sag that I've seen before include "Drop" , "Sink under weight" , "Fail to retain interest" , "Lose energy" , "Slump" .)