Thanks Paul – this was an enjoyable struggle, with some tricky parsing to work through afterwards. My favourites were 15ac, 3/24, and 5dn.
ACROSS 1 FLATTENED Coffee back in canteen, provided cups laid out (9) for definition e.g. in a fight, to lay someone out / to knock someone unconscious / to flatten someoneLATTE=type of “Coffee”, plus the ...