King taking black chesspiece (6)
I believe the answer is:
knight
'chesspiece' is the definition.
(I've seen this before)
'king taking black' is the wordplay.
'king' becomes 'K' (chess abbreviation).
'taking' is a charade indicator (letters next to each other).
'black' becomes 'night' (night can mean as black as night).
'k'+'night'='KNIGHT'
(Other definitions for knight that I've seen before include "Chesspiece which moves in the shape of an L" , "One entitled to use "Sir"" , "Male honoured by the British sovereign" , "Jumping chess piece" , "Chess piece shaped like hors's head" .)