Everyone appears to have solved this quiz quite easily as not many chats concerning it. However is it possible for clues on the following; I have looked at the previous chats and still havent got number 21.
2. Colonists developing spare film - right? (7,7)
4. King George and son got together to see the relative. (8)
5. A sweet parent was very generous but had an ulterior motive. (5,5)
11. Mr Mason got involved with Degas and became a US artist. (7,5)
17. ..... and the moneylender from Amsterdam is very critical.
21. A husband, old Bob, took Penny on the river ..... (6)
24. Abandoned, a comely urchin's found in the library. (2,6,6)
'Is it possible for clues on the following..' had me thinking the OP wanted ABers to give additional clues, rather than the answers. Maybe that's the wrong interpretation!