Stars offering old jokes on island (9)
I believe the answer is:
capricorn
'stars offering' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'old jokes on island' is the wordplay.
'old jokes' becomes 'corn' (corny or cheesy material).
'on' is a charade indicator (letters next to each other).
'island' becomes 'Capri' (Italian island).
'corn' put after 'capri' is 'CAPRICORN'.
Can you help me to learn more?
(Other definitions for capricorn that I've seen before include "7 [SIGN OF THE ZODIAC]" , "Goat star sign" , "It's a Tropic, and the Sign of the Goat" , "Tropic - Zodiac sign" , "Sign of winter" .)