Calm during lease renewal (6)
I believe the answer is:
serene
'calm' is the definition.
(I know that calm can be written as serene)
'during lease renewal' is the wordplay.
'during' says the answer is hidden in the clue.
'SERENE' is hidden in the letters of 'lease renewal'.
(Other definitions for serene that I've seen before include "Placid" , "Fair" , "Impassive" , "Not agitated" , "Peaceful and contented" .)