Summary of a British Standard pamphlet (8)
I believe the answer is:
abstract
'summary' is the definition.
(I know that summary can be written as abstract)
'a british standard pamphlet' is the wordplay.
'british standard' becomes 'BS' (legal abbreviation).
'pamphlet' becomes 'tract' (synonyms).
'a'+'bs'+'tract'='ABSTRACT'
'of' acts as a link.
(Other definitions for abstract that I've seen before include "Art form; remove" , "Conceptual" , "Rothko work?" , "Extract; summary" , "Theoretical; painting" .)