Times 25697 - bring on the neutrinos

Solving time : 18:28, which puts me not just first on the leaderboard, but as of right now, only on the leaderboard! I believe we may have our tricksy one for the week. There's one answer where I did have to rely on wordplay alone and keep the old fingers crossed. Now that I type the answer in to Google (what did we do without Google? Did bloggers go to libraries in the middle of the night?) the reference shows up as the fifth possibility, so I'll call relative obscurity.

After seeing 24 down I was sure we were headed to a pangram, but we appear to be a J short. Not sure where it could be worked in.

Update: as I'm ready to post this, I check again and I'm still the fastest (out of 5) including some normally far faster than me. So yep, the tricky one.

Away we go...

Across
1	CUPPAS: C(about),UP(over), then SAP(juice) reversed
4	SQUADDIE: DIE(make exit) after S(small), QUAD(yard)
10	PERIHELIA: E in (I,HELP,AIR)*
11	PIP,ER: the Queen being our leading female
12	CAM(river near universities),BRAI(n): This was the one I had to get from wordplay, I had not heard of the battle, but apparently it was the first one to significantly use tanks
13	T,WO(without),IN(home),CH(central heating): "so long" is the definition I guess meaning a specific length
14	IN(burning, as in popular),DIE(thing thrown with spots): reference to the common name for the Independent (which has a crossword I'll tackle in the morning)
15	TURANDOT: A in TURN(cycle) then DOT
18	ALL THE GO: H in (LET GOAL)*, definition being "in"
20	WRATH: RAT(desert) in WH(en)
23	OCARINA: tricky wordplay - N in AIR, then A CO(carbon monoxide), all reversed
25	NOW THEN: or NOWT HEN - my favorite clue of a crafty bunch
26	MILER: hidden reversed in pRELIMinary
27	EVEN MONEY: EVEN(flat) then ONE(I) in MY
28	DETOXIFY: anagram of TOYED and FIX
29	IN SITU: TIS(musical notes) in UNI, all reversed
Down
1	CAPUCHIN: CAP(limit) then the middle parts of mUCHo vINo - I think the meaning of a friar has been used before, but I usually think of this as a monkey
2	PYRAMID: P(little change) over YR(year),AMID(on) - more crafty wordplay
3	ABHORRENT: anagram of ON,BREATH,R
5	QUARTER, POUNDER
6	APPRO: alternating letters in wAs PaPeRbOy
7	DIP INTO: 1,PINT in DO
8	EARTHY: I think this is L removed from EARTHLY - though in Times clues I thought the convention was to have the word first and the subtraction second?
9	FLY IN THE FACE OF: FLY IN THE FA, CEO, F
16	NEWSWOMEN: EW(bridge places) in NSW(New South Wales), then OMEN
17	THANK YOU: TO,U(bend) containing HANKY
19	LEAFLET: T in (FEE,ALL)*
21	ASHANTI: SHAN'T in A1
22	ZOOMED: DEMO,OZ all reversed - I think referring to photography
24	IBROX: another reversal, this time ORB in XI(football team)