Just a comment. Seven of the clues refer to the answers to 16 & 7 and two of the clues refer to 25 with one referring to all three.
I don't claim to be the best solver in the world but without managing to solve 16 & 7 , it cuts down what you can have a go at.
Having seen the completed puzzle on the 225 site , a lot of the other clues are hard.
What do others think of puzzles like these with so many cross references?