Old city from which Romeo is exiled in play (3)
I believe the answer is:
toy
'play' is the definition.
(I know that play can be written as toy)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for toy that I've seen before include "Trifle or dally with" , "Child's amusement" , "Doll or teddy, say" , "One of spelt out words" , "Miniature (dog)" .)