Possible Clues:

• It's placed at the end of a word
• Less, when added?
• Word added to the end of another
• Append
• One on end of word
• Decline to change this final part of one's words?
• Half-a-dozen posh fellows included - added at the end
• Addition to end of word
• Letter or letters added to the end to make another word
• Letters added to end of word to make another word