Can some kind soul give me a HINT ONLY please as to what 6 down might be. The clue reads, "Substance of dune in shifting action drags bucket down.(4,4,3,4). I have R_I_/ C_T_/ A_D/ _O_S. I can fit any number of words but none of the make any sense as a phrase. Thanks in anticipation as I've now to go and prepare some dog food and then encourage a very faddy elderly greyhound to eat. I may be some time...