Author Levin seen in Admiralty (3)
I believe the answer is:
ira
'author levin' is the definition.
(I've seen this in another clue)
'in admiralty' is the wordplay.
'in' indicates the answer is hidden within the clue.
'IRA' can be found hidden inside 'admiralty'.
'seen' is the link.
(Other definitions for ira that I've seen before include "Militant Irish nationalist organisation" , "nationalists" , "terrorists" , "Illegal organisation, in short" , "Songwriter George's elder brother" .)