Retaliation from dictator even genocidal (7)
I believe the answer is:
revenge
'retaliation' is the definition.
(I know that retaliation can be written as revenge)
'from dictator even genocidal' is the wordplay.
'from' indicates the answer is hidden within the clue.
'REVENGE' is hidden within 'dictator even genocidal'.
(Other definitions for revenge that I've seen before include "An eye for an eye" , "Ship remembered in verse" , "Malicious retaliation" , "Retribution" , "Satisfaction taken for injury" .)