Turning in close to meet bishop at entrance (7)
I believe the answer is:
bending
'turning' is the definition.
(bending is a kind of turning)
'close to meet bishop at entrance' is the wordplay.
'close' becomes 'end' (close can mean to end or finish).
'to meet' says to put letters next to each other.
'bishop' becomes 'B' (chess abbreviation).
'at entrance' becomes 'ing' (I am not sure about this - if you are sure you should believe this answer much more).
'end' put after 'b' is 'bend'.
'bend'+'ing'='BENDING'
'in' is the link.
(Other definitions for bending that I've seen before include "Curving" , "What's facilitated by joint" , "Stooping" .)