12 down: Freeman loses head — it opens round manic middle — and she gives her all at the death (5, 5)
Black humour at its finest: Freeman loses head — it opens round manic middle = Morgan – m + do(n)or = organ donor = she gives her all at the death.
4 down: Improperly saw tournament VIP?
Another reason cryptics are wonderful: solecisms are welcome. Here, improperly saw = seed (see in the past tense as a weak verb) = tournament VIP.
5 down: 1-down (heard) exile admits Labor leader easily beaten (10)
Nice aural clue with heard exile admits Labor leader = (sounds like) outcast + admits L = outc(l)assed = outclassed = easily beaten.
15 across: Theatrically condemned lilo containing holes (5)
A nice direct clue, and a nice image of a holey lilo: lilo containing holes = bed + 00 = booed = theatrically condemned.
20 across: Jerks — getting rocks off — spice in text (6)
Is this officially the first reference made to text messages in a DA? Here, getting rocks off — spice in text = spice – ice + sms = spasms = jerks.
2 down: Anyhow, may soured wrangle invite such belligerent rhetoric? (3, 3, 5, 4)
Again, another entertaining direct clue: anyhow, may soured wrangle = you and whose army = invite such belligerent rhetoric.