1: Note vehicle in picture puzzle (5)
2: And not in town, ordinarily (3)
3: Perhaps men sit and eat in a cafe (9)
4: Many sound prospects for prospectors (5)
5: Shiny flat-bottomed boats heading north (5)
6: Toss a hammer into a nuclear accelerator! (4,7)
7: Relieves each emergency service (5)
9: Moving round to booming (7)
11: Stimulant produced as choir paid off (11)
13: How to get around doing business, essentially (3)
14: A king involved in the French connection (7)
15: Town's rail transport, not express? (9)
16: 4-down Arias hit high note in some of the lungs (3,3)
19: Directors said to be unamused. (5)
20: Tours river, merging initial impressions with remembered legends (5)
21: Principle unaffected by revolution (5)
23: Belated top-and-tailing to gladden one's heart (5)
26: Freshen the atmosphere (3)