Sailor’s left nothing in Iberian city (5)
I believe the answer is:
porto
'iberian city' is the definition.
(Portuguese city)
'sailor's left nothing' is the wordplay.
'sailor's left' becomes 'port' (I've seen this in another clue).
'nothing' becomes 'O' (looks like zero - 0).
'port'+'o'='PORTO'
'in' is the link.
(Other definitions for porto that I've seen before include "champion of Europe" , "Portuguese wine city on the Douro" , "City port of Portugal" , "City in NW Portugal (Portuguese spelling)" , "City on the Douro estuary" .)