Possible Clues:

• New Yorker's behind acceptable British driver
• He was fifth at Silverstone
• Mushroom type
• Worthless, they say, yet not thrown out
• Sounds as if it goes through the whole of the cask on this
• So to encourage the ram to continue to fight needs a hole
• Tell the goats to continue fighting, but to make it fast through the hole
• Although it's so heavy, there's a hole for it
• One may invite the press to function - not back to bar
• Continue with the head-on encounter, and make it fast