Italian city in deluge Noah discovered (5)
I believe the answer is:
genoa
'italian city' is the definition.
(I've seen this before)
'in deluge noah discovered' is the wordplay.
'discovered' indicates a hidden word (remove the letters covering the answer in the clue).
'GENOA' is hidden within 'in deluge noah'.
(Other definitions for genoa that I've seen before include "Seaport in northwestern Italy" , "North Italian port" , "Type of rich fruit cake" , "Italian city; sail" , "City of Italy" .)