das Kleidungsstück
garment
A single item of clothing, such as a pair of pants, a shirt, a skirt, or a jacket.
Dieses Kleidungsstück passt nicht mehr, ich sollte es spenden.
This garment no longer fits; I should donate it.

garment
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garment
A single item of clothing, such as a pair of pants, a shirt, a skirt, or a jacket.
Dieses Kleidungsstück passt nicht mehr, ich sollte es spenden.
This garment no longer fits; I should donate it.

The word is composed of 'Kleidung' (clothing), the linking -s, and 'Stück' (piece). So it literally means 'a piece of clothing' and is used to refer to one individual item from the whole category of clothing.
Für die Reise packe ich nur meine liebsten Kleidungsstücke ein.
For the trip, I am packing only my favorite garments.
'Kleidungsstück' (garment/item of clothing) is a rather formal and general term. In everyday language, people often name the specific item directly, for example 'die Hose' (the pants), 'das T-Shirt' (the T-shirt), or 'die Jacke' (the jacket).
Bitte geben Sie alle getragenen Kleidungsstücke in den Wäschekorb.
Please put all worn garments in the laundry basket.
The word is often used when talking about clothing in general or counting items without naming a specific piece. It emphasizes that it is a single item.
Jedes Kleidungsstück in dieser Kollektion ist handgefertigt.
Every garment in this collection is handmade.
clothing
'die Kleidung' and 'das Kleidungsstück' are closely related, but they do not mean the same thing. 'Kleidung' means all the things together that people wear on their bodies, for example for everyday life, work, or winter. 'Ein Kleidungsstück' is just one single item of clothing, for example a jacket or a shirt. Learners may confuse the words because both talk about clothes. If you are speaking generally about what someone wears, 'Kleidung' is correct. If you mean one single item, 'Kleidungsstück' is more precise.

Im Geschäft hat Lisa ein rotes Kleidungsstück anprobiert.
At the store, Lisa tried on a red garment.
Für die Wanderung braucht Tom warme und bequeme Kleidung.
Tom needs warm and comfortable clothing for the hike.