The phrase "a slight piece" is correct and usable in written English.
It can be used to refer to a small or minor portion of something, often in a context where size or significance is being described.
Example: "He only contributed a slight piece to the overall project, but it was still valuable."
Alternatives: "a small part" or "a minor portion."
But the overture is quite a slight piece.
It's a slight piece, but it closes in on something real and lights it up unexpectedly.
"Night Training" is a slight piece about a studious draftee sadistically abused by his training officer.
It's a slight piece, and perhaps overextended here, but Ellie Jones's promenade production exudes the right air of jovial anarchy.
It is a slight piece in a Neo-Classical style, and it tells us what we already know about Shostakovich's understandable bitterness.
Elaine Heekin and Bruce Walczyk were a pair of hapless house-cleaners in their "Plod," a slight piece, set to music by Latin Dance Party and the B-52's, that ends on a very sour note.
A photograph of Jerry's father, by contrast, shows a slight man in a three-piece suit with a pained expression on his face.
"Lunch Hour" is an evocative but slight piece about a high school reunion that triggers an aging man's memories of the girl who gave him entree to the cool crowd at school so many years ago.
Advanced Style is a diverting, if slight piece that doesn't reach too far outside its own world: a New York fashion movie about a New York fashion blog.
It is an elegant if slight piece of work, touching and intriguing by turns, but hampered structurally in that it relies on two separate flashback sections – one showing Holmes's recent trip to Japan, the other from three decades before, his final case, which still haunts him, involving a mysterious missing woman, Ann Kelmot, played by Hattie Morahan.
This slight piece needed quickness and a touch of the bizarre, but instead hit the same note over and over, finally getting to its gory conclusion 15 minutes beyond its scheduled running time.
