Last two, and bamboozled.
22ac) Amount of work needed to gain an honour from this famous Swede (6) I have ?D?E?G, erg is unit of work, and Edberg looks good, but what’s the honour??
And 28ac): Novel performance of Sunday in the Park with George? (8,7)
I have ?A?B?T?S, ?H?A?E?, and guess it might be something like Babbitt’s Theater, but have looked at it for days and am unconvinced.