The answer to the crossword puzzle for the term 'SECOND WORD IN MANY A LIMERICK' is ONCE. This four-letter word is often used as the second word in a limerick, which is a humorous five-line poem that typically follows an AABBA rhyme scheme. The first, second, and fifth lines of a limerick usually have three metrical feet, while the third and fourth lines have two metrical feet. The use of the word 'ONCE' in a limerick is often used to create a humorous effect.