1 Reviews e.g., 1/12's Form V, instructionally by arrangement (4,4)
5 Fiona's core proposition is not about restricted rest (6)
10 Lament plaintive Song for Rossetti (dead), ends in recurrence (5)
11 Unlimited counts at the end, a woman that's given birth a thousand times to Chief (9)
12 Socialising is not unusual for experts at reasoning (9)
13 These numbers oddly amount to nothing and beguile ears regularly (5)
14 Jack and Thomas unconventionally sat out (6)
15 Instructionally piss in 1/12's space - primarily swap partners, adds zest (7)
18 Without an alternative, 1/12's resolved to limit space's end, middle and beginning (7)
20 An attendant in concrete, empty houses from East (6)
22 Groups of 1/12 switches (5)
24 1/12, without introduction, worked with many people in the end and foremost is deserving praise (9)
25 Everyone's after the big building, an uncomfortable position being behind it (5,4)
26 Say, a bot starts to lock and release vaults automatically (5)
27 Disaster struck as evolution made a step (6)
28 Elementary school in restoration, withhold microloans for fuel (8)