Relative of turquoise (4)
I believe the answer is:
teal
'relative of turquoise' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for teal that I've seen before include "Dark green-blue; duck" , "Type of duck" , "Small, short-necked duck" , "Strange tale of a duck" , "Bluish shade of green" .)