Possible Clues:

• That's the height of it after X, and that's the whole of it
• Agree - count
• The way men may get to be agreeable if they put their minds to it
• Keep it in mind that this can be how men agree
• Count up; match
• Might men do this when they have a mind to agree?
• Word on a bridge card
• Reckon up
• ''--- Ho!''
• Score's hard to swallow before close of play