Maybe naval duty stirred up carnage around House (9)
I believe the answer is:
anchorage
'maybe naval duty' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.
'stirred up carnage around house' is the wordplay.
'stirred up' indicates anagramming the letters (letters get stirred up or mixed).
'around' is an insertion indicator.
'house' becomes 'ho' (abbreviation for house).
'carnage' is an anagram of 'ancrage'.
'ancrage' enclosing 'ho' is 'ANCHORAGE'.
Can you help me to learn more?
(Other definitions for anchorage that I've seen before include "where you might fnd a refuge" , "Place for ship to rest securely, and Alaskan seaport" , "Largest city in Alaska" , "Where boats may be moored" , "Roadstead" .)