21d. 16th Century sword Dance (8) _A_A_H_N (I think this one has already been answered on this site but I get an error on trying to open the relevant page)
28d. Any of the eared seals, including the sea-lions and fur seals (5) O_A_Y I've found out a lot about eared seals - but no name which fits the letters I have.
The OED (Onllne) quotes - "A 16th-cent. sword dance related to the morris dance, performed by dancers in extravagant costume and representing a fight or duel."