Naval destroyer belonging to me (4)
I believe the answer is:
mine
I believe this clue is a double definition.
'naval destroyer' is the first definition.
(I've seen this in another clue)
'belonging to me' is the second definition.
(I've seen this in another clue)
(Other definitions for mine that I've seen before include "Donnybrook" , "Excavation in the earth for digging coal etc" , "Store" , "Explosive device concealed in ground" , "Rich source" .)