Victorious flag officer in hold (6)
I believe the answer is:
nelson
I believe this is a double definition.
'victorious flag officer' is the first definition.
(I've seen this before)
'hold' is the second definition.
(wrestling hold)
'in' is the link.
(Other definitions for nelson that I've seen before include "English naval hero" , "English admiral, mortally wounded at Trafalgar" , "English admiral, lover of Lady Hamilton" , "one visibly affected by fighting" , "Noted English admiral" .)