2687: Up in arms

The unclued lights are of a kind, verifiable in Brewer.

Across

7 Recurring tea dance (3-3)

12    Following sound of artillery, I curtail call to official (9)

13    Steer clear of a hole (5)

15    Make the most of session in recruitment event (4,5)

16    Effect of high dose (6)

20    One stood up and pointed (7)

21    Support that man, ’e’s a bit of a giggle (3-3)

 22   Catch chickens circling round yours truly (6)

24    Returning to minister’s house, discovered cat hiding in furniture (8)

26    Ghanaian capital’s a bit overpriced, IMHO! (4)

27    Greek characters portrayed in paperback (3)

28    Start of Antony’s quiet destruction of Cleopatra? (3)

29    Fabricates...