But putting ladies' underwear aside (not literally!) I have trouble with 20ac. I have an answer that I think is right, but I don't see the full significance of all of the clue especially the "dispensing" bit.
Also with 19dn I have a word that fits and means "prestige" and it has a "d" in it for diamond, but do not see the meaning of the rest of the clue.
Am I being my usual silly self?