It is indeed the MiG-3, designed as a high-altitude interceptor but used as a low-level fighter and for ground support because high-altitude stuff didn't much happen over Russia. Well done!
The three services mentioned in Clue 3 were the Soviet Air Forces, the Navy, and the Air Defense Forces. The other airplane referred to in clues 11 and 22 was the IL-2. I hesitated a little about Ernie's question about whether it was designed after the start of the war in which it fought or after its country started fighting. While we usually think of the Soviet Union as starting to fight in World War II when the Germans launched Barbarossa, one could argue that its active participation began at the beginning of the war. When Germany invaded Poland, so did the Soviets (on the same side as Germany, at the time), because they and the Germans had agreed to divide Poland between them.
Here are a couple of links. I think the Wikipedia piece is a little hard on the MiG-3, and the other one may be overly positive. Not that I'm an expert, but I'd guess that the two together may give a more-balanced picture.
https://www.chuckhawks.com/mig-3.htm
https://en.wikipedia.org/wiki/Mikoyan-Gurevich_MiG-3
We look forward to a quiz topic from you, BankYank.