Let’s see it this way, you have 3 big lifts in a session.
Yes there is one main movement that will likely receive more volume/sets but the other two are also trained hard.
While in the best scenario you are using the 2nd and 3rd lifts to correct weaknesses in the 1st one, they can also be complimentary lifts.
For example I often use Farmer’s walk or Zercher carries as a 2nd or 3rd exercise in a session. Since they are trained for strength when I use them as a 2nd or 3rd exercise I normally train them for 4-5 sets of 20-40m. But I could also train them for hypertrophy, doing sets of 50-80m.
So the SGHP and Power clean can be done as part of the 3 exercises too.
If I use the power clean I prefer to use it as a the 1st exercise in the “deadlift” pattern session. Ideally the SGHP could also be done on that day, giving you something like this for a workout:
A. Power clean
Ramp to a technical solid 2RM
Lower weight by 20-30lbs and perform 2 reps EMOM for 10 minutes
B. Deadlift
4 sets of 3 reps
C. SGHP from the hang or blocks
4 sets of 5 reps
D. Pull ups
4 sets of 6-8 reps
E1. Seated rows
3 sets of 8-10 with 2 seconds hold
E2. Face pull or band-pull apart
3 sets of 12-15 reps
(E1 and E2 being a superset)
The power clean can also be done, as you mentioned on squat day, in which case it could be used as follow:
A. Back squat
Ramp to a technical solid 2RM
Lower weight by 20-30lbs and perform 2 reps EMOM for 10 minutes
B. Power clean + Front squat
4 sets of 2 power cleans + max reps front squats
C. Farmer’s walk
5 sets of 20-40m
D1. Leg extension
3 x 12-15 with 2 seconds squeeze at top
D2. Leg press / hack squat
3 x 10-12
(D1 and D2 are a superset)
E. Biceps work
And like you mention the power clean can be done on the overhead day, but that only works if your power clean and push press are in the same range):
A. Power clean + Push press
Work uo to a technically solid 2RM (clean, press, clean, press)
Lower weight by 20-30lbs and perform 2 reps EMOM for 10 minutes
B. Power clean from hang + Military press
4 sets of 3+3 (clean, press, clean, press, clean, press)
C. High incline DB press
4 sets of 6 to 8
D1. DB lateral raise
3 x 8-10 reps
D2. DB front raise
3 x 8-10 reps
D3. DB Arnold press
3 x 8-10 reps
(D1 to D3 are a mechanical drop set and use the same weight)
E. Triceps work
If you really want to focus on your power clean you could actually do all three of these days in a week, then you only have the bench press day to build.