1a: Engineer calls up about end of check (8). I've got the answer, which is an anagram (signalled by "engineer"), but I'm struggling to find a definition in the clue. Any fellow sufferers out there?
I don't know why it's SKULLCAP either but then I can't understand 18 ac or 27 ac either,even though they seem to be right. I bet thus guy's banned from doing COUNTDOWN.
In 8a "clinches" are puns (according to Chambers) - the solution is an anagram of "OAP's romantic";
In 27a it's "aye" + n + "mor", all reversed.
I still don't see the definition in 1a, though.