19 & 7dn: Watch American gun being used in Britain by king that's no agriculturist (6-8) ?a?t?r g?t???e?
1ac: Choose to keep quiet time in smoker's assembly (4,4) p?p? ????
13ac: Painters etc in suitable accommodation (9) ??a??????
20dn: Optimistic - don't come in yet! (6) ???e?t