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

Crossword clues for 20 sources 4 letters

AnswerClue
ATMS20 sources
ATOMSource of 20 Across
RICESource of about 20% of the calories consumed by humanity
BODYWith 20-Across, natural energy source
CHARLESDICKENSSource of 20 Across
TATERFolksy starch source found in 20-, 37- and 49-Across
EURSource of about 20% of U.S. imports: Abbr.
SONJAWith 71-Across, former skater/film star, and the source of the quote starting at 20-Across
BILLYGOATReputed source of the 1-Across for 20-Across
SILENTPARTNERBehind-the-scenes money source ... and a hint to the start of 20-, 35- and 43-Across
EDGERSLawn trimming tools (Bonus diagonal clue: Extra power source, literally? [enter from this answer's 3rd letter to 20-Across' 4th letter])