Rest from dispute, leading retreat (3,2)
I believe the answer is:
let up
'rest' is the definition.
(thesaurus)
'from dispute leading retreat' is the wordplay.
'from' indicates the answer is hidden within the clue.
'retreat' says the letters should be written backwards.
'putel' can be found hidden inside 'dispute leading'.
'putel' reversed gives 'LET-UP'.
(Other definitions for let up that I've seen before include "Relax one's efforts" , "Abatement" , "Alleviate" , "Slackening" , "Die away, ease off" .)