21a. Fuzzy image on screen when things go funny (8). Ph?s?ing
29a groom sees the place fir the Grand National, say (12). ?c?????c?a?e
27a maybe signal reversing, say, certain to absorb time (7) g?n????
24a interesting bird I spotted first (4) I?t? Think I've gone dreadfully wrong somewhere. Any help would be appreciated. Many thanks