It is unable to use Clown Card (#4560) with wanderer due to weapon restriction right now.
The description needs an amendment (apply 'Whip'), since wanderers cannot wear musical instruments.
Reference 1: kRO official item DB (https://ro.gnjoy.com/guide/runemidgarts/itemview.asp?itemSeq=5&ID=4560)
The word in the red box means 'Whip'.
Reference 2: divine-pride.net item DB (https://www.divine-pride.net/database/item/4560/clown-card)