2 Yellow pigment not in clay (4) LUH?
29 Director cut away from fanciful bird in motion (4) LIV?
38 America’s allowing a title of respect for you, formally (4)
32 Perhaps enough said by poet about a cellar of his (5)
35 Trailed end of movie by British director (4)
24d [-2 letters] 'Fam[in]e' - 'becomes less intense'/tones down = M??e???e? remove the two 'e's from the synonym and read backwards.
27d ''Mark' as in a target/a soft touch - 'foolish be[gg]ing' 3 letters (youb can drink out of it) + letter of the alphabet (3 letters).
5d 'burton' is an obscure synonym for TACK(L)E+D(iamonds) minus the 'L' of Liz (straight clue).
37a 'sab' = sob/Scots dialect - reverse it + Rep of Argentina (def 'City').