Related Clues:
- Make a strenuous effort
- Made a great effort
- Cause (oneself) to make a strenuous effort
- Put out, as energy
- Apply pressure, maybe returning genealogist's work around ten
- Exercise, wield
- Used, as force
- Apply, as mental energy
- Use up, as energy
- Apply muscle power
- Maintain penniless specialist
- Put to vigorous use
- Former partner back about Tuesday to pull out all the stops
- Put to use, vigorously
- Employ with vigor