甘い香りが

a sweet scent

→ 甘い
phrase Rare #34,421
a sweet scent が marks 甘い香り (a sweet scent) as the subject. It is often followed by する to describe something giving off a sweet fragrance.
JA: 甘い香りが部屋に広がっている。
EN: A sweet scent is spreading through the room.

甘い香りがそよ風に乗ってくる。

A sweet fragrance drifts in on the gentle breeze.

そのメロンは甘い香りがして、とても味が良い。

That melon has a sweet aroma and tastes delicious.

バラは甘い香りがします。

Roses have a sweet fragrance.