A release by the BBC (6)
I believe the answer is:
auntie
'the bbc' is the definition.
(I've seen this before)
'a release by' is the wordplay.
'release' becomes 'untie' (I've seen this before).
'by' is a charade indicator (letters next to each other).
'a'+'untie'='AUNTIE'
(Other definitions for auntie that I've seen before include "Unite a strange family member" , "Untie a relative" , "BBC nickname" , "The BBC (coll.)" , "Name for BBC" .)