Good afternoon from Canada! I am stuck with five unanswered. Any help, much appreciated.
16A: Small light shield or buckler: _A_T_
31A: Insoluble white protein, the chief chemical component of raw silk:_I_R_I_
32A: Surname of Welsh chief who led an unsuccessful rebellion against England: _ _ _N_ _ _E_
20D: Pattern with six leaf-like lobes or sections: _E_A_O_ _
29D: Tuber of various plants, especially the taro: _D_ _
Thank you.
Hi JJC . Greeting to Canada a lovely place. I've not started my Polymath but if 3d is Tityre Tu the T is right, and 16a could be Pelta = a small shield.