Light Clay, like the Terrain Extender, increases the duration of Reflect, Light Screen, and also Aurora Veil by three turns. Pokemon that set up screens need this item to really shine in general ...

Also read: Pawmot in Pokemon Scarlet and Violet VGC Regulation ... allowing for more uses of Fake Out. Meanwhile, the Light Clay item extends the duration of Meowstic's Light Screen and Reflect.

Another useful bit of information is if the Pokemon using the move is holding the Light Clay item, then Reflect will last for ...

The held item, Light Clay, also extends the duration of Reflect ... opponent's attack and special attack stats before tagging in another Pokemon. This keeps the opponent offensively subdued ...