1 Across, Mitt and corporation with billion pounds in face reddening free-for-all (5-3-6)
10 Across, Assistance in exterminating Post Office can be found in shop (3,6)
13 Across, A file covering British group's revolting phase (4,6)
15 Across, Indebted to house husband,spent cold months avoiding wife (2,3,3)
Compiler - NESTOR
Many thanks