Bit brain-dead this morning, even after a good sleep ....
9a section of the government currrently overseen by George Osborne (7) ??o?o??
1d part of a horseshoe magnet placed across the poles to maintain its strength (6)
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4d flowering evergreen shrub with blueish black berries (6) ???t?e
3d rounded vault forming the roof of a building (4) ???e