Reprieve (3,3)
'reprieve' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for let off that I've seen before include "Fire escape" , "Spare" , "chance to avoid trouble" , "Go easy on" , "Allow to go free; discharge" .)
'reprieve' is the definition.
(I know that reprieve can be written as respite)
This is all the clue.
(Other definitions for respite that I've seen before include "Pause to rest" , "temporary delay" , "Short period of rest" , "Period of relief (from unpleasant thing)" , "Relief; breather" .)