Oyster uptown produced vomit (5)
I believe the answer is:
erupt
'vomit' is the definition.
(thesaurus)
'oyster uptown' is the wordplay.
'ERUPT' is hidden within the letters.
But, I am not sure how the hidden word is indicated.
'produced' is the link.
Can you help me to learn more?
(Other definitions for erupt that I've seen before include "Suddenly appear" , "Blow up like volcano" , "go up" , "Break out dramatically" , "Burst forth violently" .)