2d One royal editor thorughly exhausted (6) ?SE?UP used up fits the den exhausted but the clue says 6 not 4,2 .........???
33a Mean dean in Dunoon, or the equivalent (6) DEN?TE ........ must be denote - defn mean .....but the rest??
When a compound adjective like WASHED OUT or USED UP is used prenominally, it would be hyphenated, as in 'I lamented my used-up time spent doing Paul McKenna's crosswords'; so since barred cryptics treat hyphenated words as single words for length-indicating purposes (another example!), '(6)' is probably just about ok...just about. The word play, US+ED+UP, certainly confirms the solution.