Turn taking bishop to close (4)
I believe the answer is:
bend
'turn' is the definition.
(bending is a kind of turning)
'bishop to close' is the wordplay.
'bishop' becomes 'b' (abbreviation used in chess).
'to close' becomes 'end' (I've seen this before).
'b'+'end'='BEND'
'taking' acts as a link.
(Other definitions for bend that I've seen before include "elbow" , "Crouch" , "Curve; knot" , "Dish of raw vegetables" , "Repair" .)