BBC missing a release? (5)
I believe the answer is:
untie
'release?' is the definition.
(thesaurus)
'bbc missing a' is the wordplay.
'bbc' becomes 'auntie' (I've seen this before).
'missing' suggests deleting specific letters.
'auntie' with 'a' taken out is 'UNTIE'.
(Other definitions for untie that I've seen before include "Let loose" , "Remove fastenings from" , "Undo, unfasten" , "Free from binds" , "Separate" .)