Rested part of the weekend (3)
I believe the answer is:
sat
I believe this clue is a double definition.
'rested' is the first definition.
(to sit is to rest)
'part of the weekend' is the second definition.
(abbreviation for Saturday)
(Other definitions for sat that I've seen before include "Was sitting" , "Perched" , "Pulled up a 29 down" , "part of the weekend" , "Was couch potato" .)