Release article rejected by BBC (5)
I believe the answer is:
untie
'release' is the definition.
(eg to untie restraints)
'article rejected by bbc' is the wordplay.
'article' becomes 'a' (the indefinite article in English).
'rejected by' is a deletion indicator.
'bbc' becomes 'auntie' (nickname for the BBC).
'auntie' with 'a' removed is 'UNTIE'.
(Other definitions for untie that I've seen before include "Release (knots)" , "Undo, unlace" , "Free from binds" , "Free from restraining bonds or ropes" , "get rid of bonds" .)