ACROSS

 1  and 18 down Evidently the butcher refuses to cut up an off-color animal. (1,5,3,1,6,3)

 6  Unbleached color. (4)

10  Government take-over headed by such that should be married. (7)

11  One of those things associated with little grains of sand that serves as a fall hindrance. (7)

12  Liqueur served up, in estate settlement. (8)

13  An island in America, primarily, or elsewhere? (5)

15  Associated with 24 down as a comparative certainty. (5)

17  It might make starting difficult. (5,4)

19  Duck! It makes the arms green! (9)

21  Perhaps struck for material gain. (5)

23  Indians of the Brahmin caste? (5)

24  Somewhat ticklish. (8)

27  It shows you may have worked hard, to a certain degree. (7)

28  If 24 down is not natural, one might look into it. (7)

29  and 26 down Brings back sleep on such things as may have gold or silver? (8)

30  Ushers might, in fancy establishments. (10)

DOWN

1  Might cause a scratch. (4)

 2  A couple of times a year it almost describes a horse and another animal. (7)

 3  Such a measure is for a psychologist. (5)

 4  Points to cases that have the indirect object of certain drugs. (9)

 5  One might split, tighten, secure or lever. (5)

 7  It should be topical, and almost tropical. (7)

 8  Certainly not like Cole, being rather careless. (10)

 9  Pertains to those of which one might be firm. (8)

14  Watch the old-fashioned type–and stop one that meanders. (4-6)

16  Studying the rhythm of the feet? (8)

18  See 1 across.

20  Such instructions for preparation might be precise, however indirect. (7)

22  Is having such power associated with disaster? (7)

24  The ad make-up might go with Schubert’s maiden. (5)

25  The air should be seasonal. (5)

26  See 29 across.