ropa de fiesta 8
It's perfectly understandable. There may be a doubt about the use of the preposition 'of' instead of 'clothes for [going to a] party', but it's not unusual, it's also used 'glass of water' instead of 'glass of water' or 'phone call' instead of 'phone call', so it's not a mistake.
Like 0
* Only one "like" per meaning and day, the more "likes" the meaning will appear higher in the list