The term 'Fiddle with a Fiddle' is a phrase used to describe the act of playing a stringed instrument, such as a violin or fiddle. The crossword solution for this term is 'TUNE, ' which is a verb meaning to adjust the pitch of a musical instrument. Tuning a fiddle is an important step in preparing to play it, and is done by tightening or loosening the strings until they are in the correct pitch.