Tricky indeed.
10a First half of ELV(ISH), tricky, arch, plus AN (one). Cornish miner’s name
20d TO(I)LET + AM reversed (reviewing)
33a seems to be an &lit, where the whole is the definition. Y (duty ultimately) oN OBE (order).
If it’s not an &lit the definition has to be exhibit, but I don’t think it equates to the answer