One in a red suit (7)
I believe the answer is:
diamond
(Other definitions for diamond that I've seen before include "A suit; a gem" , "shape" , "Small type" , "Carbon gemstone" , "Ace" .)
I believe the answer is:
diamond
(Other definitions for diamond that I've seen before include "A suit; a gem" , "shape" , "Small type" , "Carbon gemstone" , "Ace" .)