Anglers lose even the passing years (4)
I believe the answer is:
ages
'years' is the definition.
(I know this)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for ages that I've seen before include "Epochs" , "Historical eras" , "Long periods" , "Awfully long time" , "Aeons" .)