Cryptic across

7 What’s the matter? It’s old Susan Little! (6)
8 One’s long walk curtailed this morning by someone who spoke to Huldah (6)
9 As rich – as poor – as a tribal leader (8)
10 In a short time a group of motorists is enveloped in sea fog (4)
11 Hymn book each sailor kept (7)
13 Bug, one carried by a doctor (5)
15 Choral symphony Beethoven wrote for ordinal? (5)
17 Greek goddess’ name escapes me, which drives me mad... (7)
20 ...there’s no end to character twists in Shakespeare’s Greek tragedy (4)
21 Place in Gilead’s a goal for leading actor’s comeback (8)
23 I, initially at that time, was enthralled by an Olympian goddess (6)
24 Bird, aquatic bird, migrating from Dee-to-Sea, say, with a couple of ducks (6)