4a Unfriendly look when spot surface detected (7) i?p?s?n? imposing or imposant
21a Hide and see drink poured (8) d???s?i?
22a Right to support monarch (6) ???p?r
27a Notional teacher (8) ????e?i?
28a Ancestry carries weight in Durham (8) ???c?t??
17d Dry wine at transport base (7) u???o??
19d Musical instrument to produce grating sound in cover (4,3) ???l ???
24d Seconds are able to look (4) s???