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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Swinging on ___, 1944 song:

ONA: Swinging ___ Star, 1944 song
ASTAR: Swinging on ___, 1944 song
ASTAR: 'Swinging on --' (1944 hit song)