Second story got old (5)
I believe the answer is:
stale
'old' is the definition.
(similar in meaning)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for stale that I've seen before include "past the sell-by date" , "Unfresh" , "Not fresh, being least" , "Lacking freshness" , "No longer fresh" .)