The term PLANT OR MOLE can refer to a SPY who is sent to infiltrate an organization or group. This type of SPY is often referred to as a 'PLANT' or 'MOLE' because they are planted within the organization or group in order to gain information or influence decisions. The term PLANT OR MOLE can also refer to a person who is hired by a government agency to act as a double agent, gathering intelligence from both sides of a conflict. In this case, the SPY is referred to as a 'PLANT' or 'MOLE' because they are planted within the organization or group in order to gain information or influence decisions. The crossword solution for the term PLANT OR MOLE is SPY, which is a three letter word.