Hall porter may deceive audible sea urge (9)
I believe the answer is:
concierge
'hall porter' is the definition.
(I've seen this before)
'deceive audible sea urge' is the wordplay.
'deceive' becomes 'con' (I've seen this in another clue).
'audible sea urge' becomes 'cierge' (I can't justify this - if you can you should give a lot more credence to this answer).
'con'+'cierge'='CONCIERGE'
'may' acts as a link.
Can you help me to learn more?
(Other definitions for concierge that I've seen before include "hotel employee" , "Caretaker's" , "One books tickets etc for hotel guests" , "Resident French caretaker" , "Interactive computer display" .)