4a It's a cricket term for the end of the day's play. Also means "is baffling".
10a Refers to a plant with a name involving 'creeper' which is extended to mean 'an eerie quality'
Always happy to help but can I suggest that, when you've done what you can, you check out the website we call 225, which explains how every clue works. Here's the link for this puzzle.....