Remove a bishop's booklet (8)
I believe the answer is:
abstract
'remove' is the definition.
(thesaurus)
'a bishop's booklet' is the wordplay.
'bishop's' becomes 'bs' (abbreviation used in chess).
'booklet' becomes 'tract'.
'a'+'bs'+'tract'='ABSTRACT'
(Other definitions for abstract that I've seen before include "Concerned with theories rather than things" , "Half-inch" , "Rothko work?" , "Kandinsky painting, for example?" , "Take away - what can't be seen" .)