I'm also wondering about that andyp.
Also, I have filled in but cannot parse the first half of 11a, doubting even whether the patience of the second half, if I had it, would help!
5d eludes me too.
"Idealism loses its focus over compounds like Captain".
I see Captain is a fungicide but don't know anything like it that fits. I assume focus means the two central letters al are ignored in anagram of idealism, and can complete the entry with a jumble of same, but it leaves a bad taste. Does "over" mean anagram here?