22 down: HEA_E? (5)
An outstanding DA special in a very specially themed crossword: hea_e = heave – v = v omit = vomit = heave.
4 down: Sweet athlete ad company thrice exploited (9-6)
A joy: athlete ad company thrice exploited = athlete ad co co co exploited = chocolate-coated = sweet.
Two gold nuggets seems like too few for such a brilliant crossword, but the clues alone are not as great as one would assume. It seems that the theme really drove this crossword upwards into new heights rather than the clues themselves.
Feel free to beg to differ.