WORLD’S SMALLEST, HARDEST CROSSWORD

ACROSS

1. Loose granular substance (4) 4. Nerve centre (abbr) (2) 5. Printing measurement (2) 6. Substantial (4)

DOWN

1. Out of business (4) 2. (L) Water (abbr) (2) 3. To disown (4) 5. Teaching process (abbr) (2)