WORLD’S SMALLEST, HARDEST CROSSWORD

ACROSS

1. Worry persistently (fig) (4) 4. (Chem symbol) rubidium (2) 5. Maori settlement (2) 6. Old English runic letter (4)

DOWN

1. Extended (4) 2. (L) Take notice (abbr) (2) 3. Withdraw slowly (4) 5. IOU (abbr) (2)