The crossword solution for the term 'START OF A FAMED PALINDROME' is 'ABLE', which is a four-letter word. The word 'ABLE' is an adjective that means having the power, skill, or resources to do something. It is also used to describe someone who is capable of doing something. In this context, it is the start of a famous palindrome, which is a word, phrase, or sentence that reads the same backward and forward.