If all else fails, ambassador cuts a dry sausage, as some say, (2,3,5)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

An envelope (‘cuts’) of HE (His or Her Excellency, ‘ambassador’) in ‘a’ plus TT (‘dry’, abstaining from alcohol) plus WORST, sounding somewhat like (‘as some say’, particularly those who use an English W) WURST (‘sausage’).