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Stuck in top left corner. These might help me finish it. 2d Revolutionary poser with unknown values being tried for Brain-Teasers’ world (9) P????????
3D Bag for yellow sock lay abandoned (4,3) Y???/???

Thanks folks

2dn is MODEL ZZ UP, all reversed.

3dn is an anagram of SOCK LAY, something that contains the yellow part of an egg.

3 Yolk Sac, bag for yellow(part of an egg). Anagram of 'sock lay'.

Thanks for your help folks