ACROSS
1 Hypothetical material thought to play a major role in the universe (4,6) 6 One of the word elements meaning eight (4) 9 Nationality of Hercule Poirot (7) 10 Reddish-skinned variety of potato originally bred in the Netherlands (7) 12 A piece of music in a slow and dignified style (5) 13 One of the presenters of (3,6) 14 Complete the theatrical expression: tread _ _ (3,6) 17 One of the flightless birds (4) 19 Part of a comet (4) 20 Region of the Pacific including Fiji and Vanuatu (9) 22 Kind of fleece named after a Russian city (9) 24 The _ Sophia, place of worship in Istanbul dating back to 537 (5) 26 Continue with one’s current activity (5,2) 27 Ligueur flavoured with the peel of bitter oranges (7) 28 Reluctant (variant spelling) (4) 29 _ Studios, film concern in Surrey (10)
