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

Crossword clues for 1961 leader:

UTHANT: World leader, 1961-71
KENNEDY: 1961 leader
UTHANT: World leader elected in 1961
NEHRU: World leader with a role in 1961's annexation of Goa