Possible Clues:

• revolting
• Like something abominable being house-broken, I had sheltered within
• Awful hiding-place? In the end, take a step back
• Unsightly
• Ghastly retreat, second for tommies at the front
• Pelt American all round ring? That's horrid
• Ghastly retreats after time ran out
• Conceal everything inside house that's grotesque
• Screen old American that's very ugly
• It's not fair so to have concealed nothing over us (7)