Possible Clues:

• The jumper's way of saying 'Neigh!'
• Fur-seal on the rocks? No
• Nyet or nah, e.g.
• Alf sure makes this, as is his wont
• (A) rejection
• Proposer's fear
• Almost melt old coin on the edges - maybe never
• Being told no to request, will not oblige
• Genuine acceptance of fellow American? Anything but!
• Female leads us in serious indication of unwillingness