早速ですが、redundantな他の具体例を挙げてみます。紫字はネイティブチェッカーのコメントです。
1.
I joined a music band at high school.
↓
I joined a music band at high school.
A “music band” sounds redundant. (Most bands are involved with music).
2.
You say you play the flute, but we don’t have a music band. We only have a guitar club.
↓
You say you play the flute, but we don’t have a music band. We only have a guitar club.
‘Music band’ -> ‘band’ as ‘music’ is redundant.
3.
They defended for the rest of the game and won the victory.
↓
They defended for the rest of the game and won the victory.
You could probably delete “the victory”. Seems redundant (a victory = win).
4.単語レベルではなくこんな表現レベルも。
This is one of the traditional Japanese clothes made in Japan.
↓
This is traditional Japanese clothing. –OR– This is traditional clothing made in Japan.
“Japanese ... made in Japan” sounds a little redundant.