Lesser enemies get peaceful (6)
I believe the answer is:
serene
'peaceful' is the definition.
(similar in meaning)
'lesser enemies get' is the wordplay.
'get' says the answer is hidden in the clue (I've seen 'got' mean this).
'SERENE' is hidden within 'lesser enemies'.
(Other definitions for serene that I've seen before include "Calm, peaceful, tranquil" , "Calm and relaxed" , "Calm and unclouded" , "Tranquil, perfectly calm" , "Calm and composed" .)