Possible Clues:

• That's an admission, of course
• The right to go in to the dish
• Leaves on the end, as a matter of course
• Leaves on the end of it, ofcourse
• Swordfish, perhaps
• 17 across brings this to an end, as a matter of course
• A dish allowed admittance
• Of course it ends like 1 across
• The right to be admitted
• As a matter of course this ends in wood