Clearing Member: Clearing member is a member of an exchange clearinghouse responsible for the financial commitments of its customers (a member of clearing organisation). All trades of a non-clearing member must be registered, processed and eventually settled through a clearing member.
Clearing Organization: An entity through which futures and other derivative transactions are cleared and settled. It is also charged with assuring the proper conduct of each contract's delivery procedures and the adequate financing of trading. A clearing organization may be a division of a particular exchange, an adjunct or affiliate thereof, or a freestanding entity. Also called a clearing house, clearing association or multilateral clearing organization.
Exchange: A central marketplace with established rules and regulations where buyers and sellers meet to trade futures and options contracts or securities. Exchanges include designated contract markets and derivatives transaction execution facilities.
Put: Put is an option contract that gives the holder the right but not the obligation to sell a specified quantity of a particular commodity or other interest at a given price (the "strike price") prior to or on a future date. Call options is another type of options.
Trader: Trader is a merchant involved in cash commodities or a professional speculator who trades for his own account and who typically holds exchange trading privileges.
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Naked options trading is very risky - many people lose money trading them. It is recommended contacting your broker or investment professional to find out about trading risk and margin requirements before getting involved into trading uncovered options.