Wearing crown of England during studio broadcast (7)
I believe the answer is:
tedious
'wearing' is the definition.
(I've seen this in another clue)
'crown of england during studio broadcast' is the wordplay.
'crown of' suggests taking the first letters.
'during' is an insertion indicator.
'broadcast' indicates anagramming the letters (letters scattered or cast around).
The initial letter of 'england' is 'e'.
'studio' anagrammed gives 'tdious'.
'e' going into 'tdious' is 'TEDIOUS'.
(Other definitions for tedious that I've seen before include "not exciting" , "Wearisome, boring" , "Banal" , "Long, slow, dull" , "Boring, monotonous" .)