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

Crossword clues for Not one's best effort 5 letters:

AGAME: One's best effort, so to speak
AGAME: One's best effort, in sports slang
BGAME: Not quite one's best effort
BGAME: Not one's best effort, in sports
BGAME: Not one's best effort
BGAME: Not one's best effort, in coachspeak
UNSTINTING: Giving one's best effort.
MAILSITIN: Doesn't give one's best effort