It is the centenary of a daring feat. Unclued lights (two of two words) include two surnames, two locations (two pairs) and the aptly positioned name of a key item (a pair). Ignore an apostrophe.
 

Across

1    Matronage almost outraged Lily (8)
6    Appear briefly and go quietly (4)
12    Toolmaker out of Alaska playing musical device (7)
14    Pot of water bishop dropped (3)
15    Who’s there in support keeping goal? (8)
17    Some fear the dirt (5)
18    Saint introduces tiny cardinal to honey (7)
19    Extended family with Chinese aunts and uncles primarily (6)
22    Brilliant back passed the ball (3)
27    Peg West loves Denys Crook (9,...