Through no fault of the puzzle’s own, I fell asleep while solving it. Not that I wouldn’t have taken a long time anyway, but the about time is not representative.
1A, Rock samples – DEMOTAPES
10A, Rub together – GNASH
23A, Henchmen – LACKEYS
31A, Uncomfortable, in a way – SELFCONSCIOUS
35A, Start of a confession – BLESSMEFATHER
48A, Receiver of some contributions – ROTHIRA
52A, Uncomfortable – ILLATEASE
1D, Rappers’ wrappers – DORAGS
10D, Actress co-starring in TV’s “Burn Notice” – GLESS
21D, It begines with an E (in two ways) – EYECHART
24D, Genealogical discovery – ANCESTOR
37D, Multipart art – MOSAICS
42D, Word that first appears in Matthew 1:1 – CHRIST