Gorbachev's policy
I believe the answer is:
glasnost
'gorbachev's policy' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for glasnost that I've seen before include "Gorbachev's policy from 1985" , "Gorbachev's policy of "openness"" , "Soviet policy of openness" , "Gorbachev initiative" , "Openness (Russian)" .)