6 down: To fail when fishing in the Caribbean? (6)
Dead-set classic. Tobago = in the Caribbean and the special to bag 0 = to fail when fishing.
9 across: Roach damaged lips on fish heads (6)
The greatest virtue of the cryptic is that it deals in heavy servings of slang. And without at least some exposure to the seedier side, damaged lips = spli, fish heads = ff and roach = spliff would be baffling.
11, 22 across: Matchless era of history? (4, 4)
I needed some cross clues, but era of history = dark ages = matchless is really quite funny.
4 down: Bogans stutteringly uprooted yonder tree (8)
Sounds-like clues were a feature of this cryptic, and this one’s rolled gold. Tree = fir, yonder = far, uprooted yonder tree = rifraf, stutteringly uprooted yonder tree = rif-fraf-f and, of course, bogans = riffraff (which might just be the only word in the English language to contain the sequence ffr).
12 across: Duffing goal, entire disaster for Premier League team (10)
This is not a particularly brilliant clue, but it does illustrate why DAs have an added kick to them. In this clue, there are two anagram signifiers in duffing and disaster, which makes you think there might not be any anagrams at all. Then there’s also goal and Premier League team at opposite ends of the clue, which makes you think that there’s a good chance a double-meaning is part of the solution. Eventually though, you get to the point where you realise that goal and the two anagram signifiers are red herrings, and this really is just a simple anagram clue, where duffing goal, entire = relegation = disaster for Premier League team.
10 across: Stooge leader sacked, swallowing poison in cordial fashion (8)
This has nothing else to commend it other than the reference to a Stooge. Poison = bane, Stooge leader sacked = urly and in cordial fashion = urbanely.