"Good Luck, Babe!" singer Chappell (4)

I believe the answer is:

roan

(Other definitions for roan that I've seen before include "Bay horse with white/grey hairs in its coat" , "Type of 17's coat colouring" , "Two-colour horse" , "Horse with a brownish coat sprinkled with grey" , "Horse with reddish-brown coat" .)

I've seen this clue in the LA Times.

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