Possible Clues:

• Infuse or fill completely
• 'Soak the start of 13 across before eight, by the sound of it (8)'
• Drench thoroughly, soak
• Drench or soak
• Soak, make thoroughly wet
• To get if full of water, it needs onlyh one less than 13 across at last, by the sound of it
• Treat us with a compound soak
• Thoroughly wet turtle, half engrossed in swimming at sea
• Took exam open to anyone at price that's steep
• Soak and was fed before Saturday was finished