The numbering of the thread does seem to have gone awry. The first post as I see it is now reads 0.
17a the two outside letters are an abbreviation for ‘namely’. Then in the middle you have a reversal for team (a Roman numeral) and a word for support.
Before I vow never to use this site again due to the persistent and intrusive ads, can I ask for hints on 18a and 7d. I have answers for both but can't see the repelled couple and 7 I have nothing but the answer which may of course be wrong. The other answers I've been stuck on for ages I didn't know the words or phrases at all. Which is where I suspect I'm at with 5a.