A wry BBC joke turned out to be a bit of nonsense (11)
I believe the answer is:
jabberwocky
'a bit of nonsense' is the definition.
'jabberwocky' can be an answer for 'nonsense' (I've seen this in another clue). I am not certain of the 'a bit of' bit.
'a wry bbc joke turned out' is the wordplay.
'turned out' indicates anagramming the letters (turn out can mean to organise).
'a'+'wry'+'bbc'+'joke'='awrybbcjoke'
'awrybbcjoke' anagrammed gives 'JABBERWOCKY'.
'to be' acts as a link.
Can you help me to learn more?
(Other definitions for jabberwocky that I've seen before include "Twas brillig poem" , "Nonsense poem in Lewis Carroll's Through the Looking Glass" , "Lewis Carroll nonsense poem" , "Lewis Carroll poem from "Through the Looking Glass"" .)