Showing = Airing (as in displaying)
Directors = board (of a company)
So, those two words 'holding' a drinking vessel (= cup)
Pangakupu isn't the easiest of setters and this one had some tricky clues and tricky solutions.
6a isn't too bad. A 5 letter word for 'pondered', laying off (ie. removing) an abbreviation for 'millions'.
26a is another. Abbreviations for 'years' and 'old' followed by a couple of (different) abbreviations for Kings, meaning an old House (not a building).
16d is an anagram