Possible Clues:

• Greatest value
• Most saying, 'I can't think what to say'
• Top of the range for very large parent?
• Greek character retires after saying most
• Top man, I will be standing by mother
• Greatest possible quantity
• Before mountaineer's original show of hesitation, skirt peak
• Old lady after skirt top
• Two mothers bearing eleven - presumably, that's the most you could expect?
• Greatest in amount