Reverse conclusion to provide brief respite (5)
I believe the answer is:
truce
'respite' is the definition.
(I've seen this before)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for truce that I've seen before include "Temporary pause in war" , "Agreed pause in fighting" , "Cuter (anag.)" , "bit of peace" , "Agreed ceasefire" .)