Location of bridge over one sound (5)
I believe the answer is:
kenya
'location' is the definition.
(Kenya is an example)
'bridge over one sound' is the wordplay.
'bridge' becomes 'ken' (I can't justify this - if you can you should believe this answer much more).
'over' says the letters should be written backwards.
'one' becomes 'I' (Roman numeral).
'sound' indicates a 'sounds like' (homophone) clue.
'i' is a homophone of 'ay'.
'ay' back-to-front is 'ya'.
'ken'+'ya'='KENYA'
'of' acts as a link.
Can you help me to learn more?
(Other definitions for kenya that I've seen before include "Its capital is Nairobi" , "E African country" , "East African republic" , "Nairobi's country" , "East African nation" .)