Breakers from Soviet Union's Russian Federation leaders (4)
I believe the answer is:
surf
'breakers' is the definition.
(I've seen this before)
'soviet union's russian federation leaders' is the wordplay.
'leaders' suggests taking the first letters.
The first letters of 'soviet unions russian federation' is 'SURF'.
'from' acts as a link.
(Other definitions for surf that I've seen before include "to maintain one's standing on board?" , "Use the Internet" , "Waves breaking on the shore" , "Foam formed by breaking waves" , "It's created by breaking waves" .)