Many thanks for these. I have found a couple of other solutions difficult to justify too. e.g.
25ac ZAMBESI: Z is the unknown, AMBE(R) is the next bit but where does the SI come from (Zulu half)?
22d "Like bamboo over northern gorge". Is the first bit really CANY meaning like a cane (pathetic).
Also, I note that HOST (= army) was featured twice, once as a solution and once as part of a clue (equally pathetic).