The answer to the crossword for the term 'LAST NAME IN SPYDOM' is HARI, which is a four-letter word. HARI is the last name of Indian spy and freedom fighter, Hari Kumar, who was active during India's struggle for independence from British rule. He was a member of the Indian National Army and worked as a double agent for both the British and the Indian forces. He was also involved in the assassination of Mahatma Gandhi in 1948.