1: Sarah has friends from France on a Greek island (7)
5: Greek city - in the Adriatic or in Thessaly (7)
8: Encourage horse led with direction. (3)
9: Toff aimed to do himself proud. (11)
11: Smuggler participating in arms race? (9)
12: Born and raised, it is whispered, to make money (5)
13: Boggy terrain didn't sink Plan C's successor? (9)
15: Reportedly pull down more money at work (5)
17: Herb talked about the fourth dimension (5)
18: A cinerama restored examples of a country's quirks (9)
20: Expel National Service Union leaders and heartbreak will follow (5)
21: Effective arrangement by one decent person (1,4,4)
23: Criticise a computer analysis of famous passage (6,5)
26: 4-down Arias hit high note in some of the lungs (3,3)
28: Say again 'Others had food' (7)