Fetching details from the dictionary...

mandarin (esp. the satsuma mandarin (Citrus unshiu)); mandarin orange; tangerine; clementine; satsuma
citrus (Citrus spp.)
みかんを丁寧に剥く。
I carefully peel a mandarin.
みかんがとても甘い。
The mandarin is very sweet.
みかんをおやつにいただきます。
I'll have a mandarin orange for a snack.