Soviet leader with some Sandinista links (6)
I believe the answer is:
stalin
'soviet leader' is the definition.
(I've seen this before)
'with some sandinista links' is the wordplay.
'with' indicates the answer is hidden within the clue.
'STALIN' is hidden within 'some sandinista links'.
(Other definitions for stalin that I've seen before include "Bolshevik" , "Totalitarian Russian leader" , "Dreaded dictator among Latins" , "Lenin's successor" , "Infamous Russian leader" .)