So all I'm left with now is 10 (not 12) down, which looks like Morte D'Arthur - "Malory's passing of the First Night, we hear" - although 19 across has surely to be Copse ("Thicket said to be associated with thieves in thrillers"). My brain hurts...
In the online version, 19a is Frank director who discovered it's a wondrful life, but you can't take it with you (5)
This is Capra which fits with Morte d'Arthur.
Can't get 9a though, Lindsay's investigator said to show his cards - Strange!
M?L?R?M
meld 1 (mld)
v. meld·ed, meld·ing, melds
v.tr.
To declare or display (a card or combination of cards in a hand) for inclusion in one's score in various card games, such as pinochle.
v.intr.
To present a meld.
n.
A combination of cards to be declared for a score.
What a mess! And my printed TLS has 9ac as Sir David of the Mount's squire - later encountered with one foot in the grave? (7) which is indeed MELDRUM http://en.wikipedia.org/wiki/David_Lyndsay_(poet).
Hey-ho...
Can anyone help with 14a Doctor from forbidding valley exposed by Holmes as murderer(9)
S*E*N*A*E although in the light of previous conversations I am having doubts about what I have got!
Yes, indeedy: Meldrew, not Meldrum, with one foot in the grave. I don't belieeeeve it! Curiouser & curiouser. Don't think I shall bother sending this one in. :(