Across
Hungarian saint containing the blaze I mishandled (9)
Love label linked with old wine-producing region (5)
Bird presented in last part of French chapter (5)
With repetition of first part, contrive changes to sentence again (9)
I haven't cracked this one yet — but Fifteensquared have:
anagram/”changes” of ( c contrive)*, with a repetition of the first letter C-[ontrive] in the anagram fodder
Large rodent, hard to handle, not keeping up like pig (7)
Found pound and ounce, say, in abbreviated dictionary (7)
I haven't cracked this one yet — but Fifteensquared have:
L (Latin ‘libra’, “pound”), plus CAT=”ounce, say” inside OED (abbreviated form of Oxford English Dictionary) an “ounce” is a snow leopard, a type of CAT
Endless fortune I had put together, that's clear (5)
I haven't cracked this one yet — but Fifteensquared have:
LUC-k=”Endless fortune” + I’D=”I had” contracted/”put together”
Like the Chairman's little work (or books in general, we hear) (3)
I haven't cracked this one yet — but Fifteensquared have:
reference to Chairman Mao’s ‘Little Red Book’ [wiki] sounds like/”we hear”: ‘read’=”Like… books in general”
Don't allow to leave with odd characters out of discretion (3,2)
I haven't cracked this one yet — but Fifteensquared have:
odd letters removed / taken out of d- I -s- C -r- E -t- I -o- N
Agent in European capital backed Julian, say (7)
I haven't cracked this one yet — but Fifteensquared have:
Julian was a Roman emperor [wiki] REP (representative, “Agent”), in ROME=”European capital”; all reversed/”backed”
Increase organised valet parking in large parts of East End (7)
I haven't cracked this one yet — but Fifteensquared have:
anagram/”organised” of (valet)*, inside the capital letters/”large parts” of E-ast E-nd
Encountered Oliver's friend in London suburban area (9)
It's put in the kind of barns churches once found helpful (5)
Become aware of things smelt, heard but not seen (5)
Part of bicycle that doesn't make it to 24 across? (5,4)
Down
Booker? With prize ultimately secured, trim one's sails (4)
I haven't cracked this one yet — but Fifteensquared have:
REF=a referee e.g. in football, who can ‘book’ players for fouls=”Booker”, around priz-E
Power of the mind seen in part of 24 across (6)
I haven't cracked this one yet — but Fifteensquared have:
definition: Pinner is a London suburb [wiki] , part of the METROLAND area P (Power) + INNER=”of the mind” (e.g. ‘inner strength’)
If pedant is confused about hard recipe initially, he seeks way to proceed (10)
I haven't cracked this one yet — but Fifteensquared have:
anagram/”confused” of (If pedant)* around H (hard), then plus R (recipe initially)
One of six in charge of our land, one a so-called farmer (6)
I haven't cracked this one yet — but Fifteensquared have:
definition: there have been six British kings known as George, and George III was known as ‘farmer George’
Restrained, cut line in second edition (8)
See 7
6d
Imaginary character, one of the first two Wells wrote about (3,2,3,4)
Part of painter's work starts off collection of art treasures (4)
Beat seed (5)
Novel form in old verse penned by Conservatives (5,5)
I haven't cracked this one yet — but Fifteensquared have:
RIMES=”old verse” inside C + TORY=two ways to shorten Conservative=”Conservatives”
Letters from London nearly delivered for poet (5)
Coping partly with limited capital, just under fifteen pounds (8)
Deity repeatedly upset another — that's very unusual (4,4)
Denouement that's heart-rending? Not half (6)
I haven't cracked this one yet — but Fifteensquared have:
half of [heart-r]-ENDING removed
King or president (6)
Source of inspiration and great power in the writer (4)
27d
Old author I'd pronounced woke? (4-4)
See 25
Type letters or click words in the clue