Clingan will start Sunday's game against the Suns.
Clingan (knee) tallied six points (3-6 FG, 0-1 3Pt), seven rebounds and two assists across 15 minutes Friday in the Trail Blazers' 118-116 loss to the Spurs.
Clingan (knee) fully participated in Thursday's practice and is listed as questionable for Friday's game versus the Spurs, Sean Highkin of Rip City Radio 620 Portland reports.
Portland announced Tuesday that Clingan (knee) has been cleared for on-court workouts and will ramp up towards a return to play.
Portland announced Tuesday that Clingan (knee) will be re-evaluated in two weeks.
Clingan has been ruled out for Monday's game against the Grizzlies due to a left knee sprain.
Clingan chipped in 17 points (6-10 FG, 5-5 FT), 12 rebounds, one assist and eight blocks in 31 minutes during Wednesday's 106-98 victory over the Timberwolves.
Clingan finished Tuesday's 122-108 victory over the Timberwolves with four points (2-5 FG, 0-1 3Pt), six rebounds, one block and one steal across 21 minutes.
Clingan notched four points (1-1 FG, 2-3 FT), six rebounds and four blocks in 14 minutes off the bench during Friday's 105-103 loss to the Pelicans.
Clingan scored 14 points (7-12 FG, 0-1 3Pt) while adding 20 rebounds, four assists and four blocks over 24 minutes in Friday's 124-86 preseason win over the Jazz.