A noble type of retiring sailor on hammock at navel address on Midway (10)
I believe the answer is:
aristocrat
'a noble' is the definition.
(thesaurus)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for aristocrat that I've seen before include "toff" , "What's listed in Debrett" , "Noble" , "Nob" , "Nobleman" .)