Missing Link

ACROSS 2 Card, Dirty, Hat (5) 7 Acid, Chair, Turkish (4) 8 Ahead, Floor, Game (4) 9 Com, Polka, Year (3) 10 Disposable, Private, Tax (6) 11 Bag, Flying, Persian (6) 13 Half, Home, Serum (5) 14 Day, Egg, Island (6) 15 Juan, Oxford, Quixote (3) 16 Heart, Patch, Prose (6) 18 Goose, Pots, Wound (5) 21 Breaker, Force, General (6) 23 Matt, Off, Photo (6) 25 Ball, Fishing, Work (3) 26 Absolute, Hour, Tolerance (4) 27 Booth, Bridge, Gate (4) 28 Mother, Quake, Worm (5) DOWN 1 Acid, Drop, Forest (4) 2 Cut, Pastille, Sore (6) 3 Card, Finger, Linked (5) 4 Fitted, Sink, Soup (7) 5 Car, Ground, Water (6) 6 Bus, Fast, Memory (4) 12 Bearer, Blow, Light (5) 13 Demo, Name, Video (5) 15 Civil, Mechanism, Self (7) 17 Ivy, Pen, Rat (6) 19 Full, Knee, Wave (6) 20 Burner, Shave, Thought (5) 22 Open, Pigeon, Tip (4) 24 Cellar, Mine, Rock (4)

The answer to each clue is a word which has a link with each of the three words listed. This word may come at the end (eg HEAD linked with BEACH, BIG, HAMMER), at the beginning (eg BLACK linked with BEAUTY, BOARD and JACK) or a mixture of the two (eg...