1ac) Woodpiles making energy amid tombs.
The answer is fairly obviously 'pyramids' - but should it not be 'lacking energy' as the e is missing from pyres?
It does improve on reflection Malone, but my heart has learnt to sink when I see Robert Price as the setter. A couple of weeks ago he seemed to relent and I sailed through, but this week, my goodness, he's back on fiendish form.
Thanks, Bellakemp. I stuck up for the clue only because I know that what one solver likes, appreciates, can be the exact opposite for someone else - and vice versa!