Finding it hard today!
10 d. Outstrip lad with vast engine surprisingly. 5,8
I thought it was an anagram of lad and vast engine meaning outstrip, but I can't find one.
4 a. A british opera length unusual. 8
Can't get this at all!
Sorry, Andy!
(got 'ab' on my mind from the answer to the clue!! - I'm finding the Everyman harder this week than usual)
Thanks for the correction, Rusty!