What type of clause is this statement “whoever wins the race "

Unlike the response of Ahamit68 which is convoluted, incoherent, and  partially incorrect, the simple, correct answer is...

It is a dependent clause.

Explanation:

Why so?  Although it contains a subject and a verb, it does not express a complete thought, so it is not a sentence and can't stand alone.

Since humans eat cattle it is considered situational irony due to the fact that the roles were reversed and a cow ate a human

Explanation: Since humans always eat cow and a cow eating a human is the opposite you would expect in that situation