There was also a slight smell of decaying food or animal.

The water had a slight sulfuric smell, although maybe that was his imagination.

The air had a slight smell of machine oil.

Do you notice a slight smell of cinnamon in the air this morning?

He sniffed the air for the slightest smell from the glaciers far to the north.

There is a slight smell of something dead in programs like this.

There was a slight smell of burning in the room.

If the place has the slightest smell of an ambush, all bets are off and this guy's gone.

It was a very slight smell of burning wood.

"Don't I detect a slight smell of rat in all this?"