5 down: Hypocrisy typical in tennis match (6, 9)
I got this out early but tentatively because I still can’t figure out how tennis match = double standards like hypocrisy = double standards.
18 across, 7 down: Baseball score impossible with… (4, 3)
I solved this one because of the cross clues, but again, I had no explanation for why impossible with = home run like baseball score = home run.
Update: This has been edited because from TH I’ve only just learnt that a “…” means refer to the next clue. All this time, I never thought the “…” meant anything at all, so the clue really should be Baseball score impossible with away game, and the solution home run becomes not that great a mystery.
8 down: Nun half-accepted goodness over mature, rational thinking (9)
I managed to arrive at syllogism = rational thinking, but the rest?
28 across: Non-wizard aboard 7-downs (runs) (8)
Only the answer in Saturday’s paper could convince me that smuggler had anything to do with the answer to this clue.
27 across: Address illegal bookie as per hearsay (6)
I figured address = speech, but the rest of it, I’m not so sure.
25 down: … latterly produced spleen (3)
All I can figure on is that spleen = ire.
Update: See my update above, for this clue becomes a thousand times easier when it’s read as eyrie latterly produced spleen.