original: At first the aroma is apple like and pleasant but it becomes peculiarly musky when overripe.
simplifications: At first it smells pleasantly like an apple, but it becomes musky when overripe. The scent becomes unpleasantly strong after starting off smelling like apples. The scent is apple-like and pleasant. It becomes musky when overripe. At first, the smell is apple like and pleasant. However, it becomes very musky when overripe. First it smells pleasant like apples. If it is too ripe, it becomes musky. At first it smells pleasantly like apples but it becomes strangely musky if overripe. The smell of the fruit is like an apple at first, and pleasant.  But, when it becomes overripe, the smell becomes musky. At first the scent is apple like and nice but it gets very musky when overripe. At first the aroma is apple like and pleasant. It becomes peculiarly musky when overripe. The aroma is apple-like and pleasant at first, but when overripe it becomes uniquely musky.