2096: New World Symphony

The unclued lights (two of two words and the remainder when paired) are of a specific kind.
 
Across

1 Kind, like 7A (11, hyphened)
7 Well-spaced to start with (3)
13 Mate with old cattle causing fuss (7)
15 Singer losing nothing in outskirts of Mellieha – here! (5)
17 Money expended swapping model railway components (6)
18 This setter considers cross (5)
20 Changing stance, performs (6)
22 Campoli’s sauce (7)
27 Cut fruit and drink (not hot) for bird (7)
29 Divers trousers for eccentrics (5)
30 Old quote for bit of gravel in garden path (6)
34 Ungenerous chap takes pound from girl (6)
36 Organised church spread (5)
37 One of...