What you take with you to wear on Safari very much depends on what time of year you choose to go, but the general rule of thumb is layers as the weather can be quite changeable.
Mostly in the day time you’ll want to wear shorts and t-shirts with good walking boots or trainers however bear in mind that wearing white is not a good idea as it will get dirty very quickly but also and more importantly white will make you stand out to much to the animals that you will be trying to observe.
The temperatures during the day can be pretty high and the sun can be very intense so always make sure you wear a hat and if you are particularly sensitive to the sun then long sleeves made out of light cotton would be a good idea.
Temperatures in the evening can drop quite dramatically so you will need to pack some warm clothing, fleece jackets are great for this and some long trousers too. Covering up in the evening will also help limit the amount of mosquito bites that you get.