Lay on fresh tongue with fine port (5)
I believe the answer is:
dubai
'port' is the definition.
(UAE port city)
'lay on fresh tongue with fine' is the wordplay.
'lay on fresh tongue' becomes 'dub' (I am not sure about this - if you are sure you should believe this answer much more).
'with' is a charade indicator (letters next to each other).
'fine' becomes 'ai' (resembles Ad, informal term for top quality).
'dub'+'ai'='DUBAI'
Can you help me to learn more?
(Other definitions for dubai that I've seen before include "Gulf city/state" , "One of the UAE and its capital" , "Middle Eastern destination" , "Port city on the Persian Gulf" , "Country" .)