Confused account in newspaper about British Library exhibition's opening (6)
I believe the answer is:
garble
'confused account' is the definition.
(a confused or garbled account)
'newspaper about british library exhibition's opening' is the wordplay.
'newspaper' becomes 'rag' (rag is a kind of newspaper).
'about' is a reversal indicator.
'british library' becomes 'bl' (abbreviation for British Library).
'opening' indicates taking the first letters.
The initial letter of 'exhibitions' is 'e'.
'rag' in reverse letter order is 'gar'.
'gar'+'bl'+'e'='GARBLE'
'in' is the link.
(Other definitions for garble that I've seen before include "distorted transmission" , "Indistinct speech" , "Distort (message)" , "Corrupt" , "Confuse (a message)" .)