Yes Rickye, the first abbreviation is at 1A. The second seems to make a stunted leg (I don't recall mention of Louis having suffered from polio - maybe the problem is a hip displacement...)
I couldn't resolve the final instruction without first knowing the exact line of poetry. Look up the theme in wikiedia, you'll find the line of poetry not very far down. The final instruction involves an addition to just one cell.
6D - the whole cluster is the answer, surely, not just 5 of them ?