A couple of tougher clues, but a pretty standard puzzle really. The bottom right corner held out longest, helped by a typo in 18 down – ell for eel (see below).
Across:
1. PARISH. PRAIS(e)* H. Henry usually suggests Hal, but can also be the abbreviation.
10. A LIE NATION. Pretty simple structure but nice surface – I can think of a few examples.
11. GEMINI. EG< MINI.
12. NEUTRINO. ONE IN RUT*
13. OUT GO(I)NGS.
21. BASTILLE. ST in LIABLE*. Hmm, small weight makes me think of Oz, and I tend to regard a stone as quite a large weight – but it’s small in that st. is an abbreviation.
24. SUPER VISOR. Cool and super both mean good, but I don’t think you can regard them as synonymous.
25. NOAH. ON A H*. Funny anagram indicator – that’ll be a bad trip I guess.
26. AURORA. AU RORA*. Au the chemical symbol for gold
27. HYMNAL. I’m guessing… my ecclesiastical knowledge is sketchy, but this looks like a fairly straight definition.
Down:
1. PAR VENU(e).
2. RABBI(t). A rabbit can certainly be a timid person – is it also a bad player?
3. SWAHILI. HAWS< raILIng. I think Swahili’s just a language rather than ethnic group, in which case the definition’s a bit lacking.
7. BROWN IE.
8. MIDNIGHT FEAST. Cryptic def.
14. GREAT BEAR. AGREE B ART*. Not everyone likes such use of abbreviation as part of an anagram – I think it’s OK if it’s a fairly obvious one.
16. BRAVURA. RAV(e) in A RUB<. Not a very convincing surface, and I’m not sure why ‘most’ is needed.
18. LAM PREY. Don’t know about online, but my newspaper version has a misprint here – “An ell-like creature”. I guessed that might be wrong, but was looking for an elk-like creature – i.e. a moose!
20. OLIVER. Ref Bath Oliver biscuits.
23. TENON. NET< ON. Item for game=net seems weak.
Re 2d – a rabbit in cricket is one who cant bat to save his life – I should know as I am one!
http://en.wikipedia.org/wiki/List_of_cricket_terms
p.s. ‘Most’ is needed in 16d as it is RAV only, note RAVE
Sorry, you’re quite right about most – I saw that when solving it, as per notes. Just misread it looking back afterwards.
SWAHILI describes a people as well http://en.wikipedia.org/wiki/Swahili_people, from the arabic meaning “coastal dwellers”.
Perhaps NOAH on his hard trip was on his way to see them — I thought it was a pretty good &lit actually.