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

Crossword clues for Burn the midnight oil, with "up" 4 letters:

PORE: Burn midnight oil
STAY: Burn the midnight oil, with "up"
CRAM: Burn the midnight oil
CRAM: Burn the midnight oil, perhaps
CRAM: Burn the midnight oil at college
OWLS: People who burn the midnight oil.
PORE: Burn the midnight oil
CRAM: Burn the midnight oil, student-style
CRAM: Burn the midnight oil studying
PORED: Burned midnight oil
PORES: Burns midnight oil
STAYSUP: Burns the midnight oil.
STAYUP: Burn the midnight oil
UPGRADING: Like a teacher burning the midnight oil?
BONESUP: Burns the midnight oil
UPLATE: Burning the midnight oil, so to speak
WORKINGLATE: Burning the midnight oil
IDIOM: Burn the midnight oil, e.g.
STILLUP: Burning the midnight oil
UPLATE: Burning the midnight oil
WORKLATE: Burn the midnight oil
LUCUBRATE: Burn the midnight oil
STUDY: Burn the midnight oil
IDIOM: Burn the midnight oil, for one
STUDIED: Burned the midnight oil, perhaps
CRAMMED: Burned the midnight oil
AWAKE: Burning the midnight oil, say