To get you started, make an anagram of first 4 letters of second word in 33a, or an anagram from the last 10 letters of 17a clue (going backwards) to get a 4-6 answer.
21d Sweetheart I give you pounds, euros and such (6) TH?RIA looks like THERIA from the jumble of hearti but can't find a defn ....unless i have gone wrong elsewhere?