I had the age/ape conundrum, but I supposed that the 7 across element of "manage" cannot really be a prefix, as such. By my reckoning 7Ac comes
BEFORE 1Ac (6,5), 10Dn (2,3 repeats 7Ac), 30Ac, 32Ac (2,3) = 4
AFTER 6Dn, 16Ac, 37Ac, 40Ac, 19Dn = 5
It surely can't be a misprint in the preamble?
I looked at CHILD (as a follower) for a while for 16Ac, but ruled this out as I have INURNED for 5Dn and went with the fielder.