Hi Jogamel and others,
Unlike you, I've got the observation but not the information to complete the puzzle. The first two what? And the penultimate word seems to use the letters DA then ED.
20a - who carries clubs? (not the card variety)
23a - inmates is extra and the answer is hidden in the clue
24a - A famous Blair, not Tony or George Orwell. Half of lied - about/on etc.