The unclued lights (five of two words and one of three) should be paired to reveal four expressions verifiable in Brewer. Ignore one accent.

Across

10 Plant setter left, it being covered in resin (5)
11 Hardy bay tree? Obviously not (6)
12 Bioethical problem of 150 willing to participate with 18 (7)
16 Central American distributed narcotics – a fool (10, two words)
17 Be subject to stress pointlessly (8)
20 Purple stonecrop – otherwise almost rosé, in France (5)
21 The very nature of German city church (7)
22 Queen Elizabeth and Prince Philip have no love for old coins (5)
24 Several parishes with services starting mid-week...