A Diversion

How might one profitably spend a day off? I don’t know, but this certainly was fun…

* I should probably mention that there is a theme, and that the theme affects how 15 of the grid entries appear. Not 16, though it could have been. And not 15 of the answers, because some answers are split on the grid.

Across

5 The underhanded action that strained trans‐Tasman relations rose, perhaps? (4)
7 Before rink widened alarmingly, 10‐down played there (2, 4, 6)
9 Sit around all weekend and sketch (4)
11, 26‐down In the manner of 4‐down, how to share a pair of model vases taken to a fight (4, 3, 4, 5)
12, 10‐down Actor from Casino influenced by 31‐across, perhaps (4, 5)
14 Live with decent Cage film (2, 3)
15 13‐down on trial, done for speed (8)
17 Near purchase 14‐across (2)
18 Can Orient Express carry this luggage ‐ it could go either way! (9)
20 A two‐way street leads to house, for example (2)
23 See 21‐down
25 Consider 32‐across upset about nothing (5)
26 Songwriter for Valli's group didn't use 5/4 as an outlet (4)
28 At the Beginning, God was eons creating, with this the likely result! (2, 4, 2, 3)
29 The note says what to do in a lifeboat (4)
31 Accurate from the start?! (5, 2, 5)
32 Great Dane had to go for a walk on the beach, or go 21‐down! (4)

 

Down

1 Take a stick to put down insurrection, and you'll end up with a shambles (8)
2 Father hangs around mixed pairs with kin, then takes off with ground pepper (7)
3 False attitude to entail getting into team (5)
4 Reflecting the sense of 16‐down, appropriately (9)
5 A group usually represented by its elders, so not about to take direction! (1, 1, 1)
6 9‐across a brilliant vehicle to turn into an art form (5)
8 All over with principal Oz dog found in capital after tipoff (4, 4, 2, 3)
10 See 12‐across
12 Positive hamburger is available in jail (2)
13 Come aboard yacht at the outset to reach the isle (3)
16 Now take the theme! (9)
19 Averse to a drawback?! (8)
20 The inspiration for first Beatles' hit, some say (1, 1, 1)
21, 23‐across A place to shelter from the storm, when muffled thunder on several sides surrounds the street (5, 3, 5)
22 Material used in shipping 18‐acrosses comprised of brown, unfinished paper (7)
24 Reported for intra‐venous drug use (2)
26 See 11‐across
27 Influenced by the vibe of the king's choice of footwear... (5)
30 … I met cobbler at his store (3)