1 Has difficulties (9)
6 Genus of rhubarb (5)
9 Clothed (7)
10 Extremist (7)
11 An installment of a TV series (7)
12 Left out (7)
13 Souvenirs (9)
15 Zest (5)
16 High, low and neap (5)
19 Allegiances (9)
22 Poison (7)
23 Citizen of Tijuana (7)
25 Examine in detail (7)
26 Income (7)
27 Hurriedness (5)
28 Merchants (9)
Down
1 Fire (5)
2 Not inside (7)
3 Constricts (7)
4 Empower (5)
5 Earnestly (9)
6 Characterized by raised strips (7)
7 Arouses (7)
8 Musical (9)
13 Frisky or flirtatious (9)
14 Metric unit of distance (9)
17 Invents (7)
18 Earnest (7)
20 Eighty-seven in Roman numerals (7)
21 Infuriate (7)
23 The quality of being deserving (5)
24 Necessities (5)