Bishop fell after broadcast, being dizzy (14)
I believe the answer is:
scatterbrained
'dizzy' is the definition.
(thesaurus)
'bishop fell after broadcast' is the wordplay.
'bishop' becomes 'B' (chess abbreviation).
'fell' becomes 'rained' (as in rain falling).
'after' says to put letters next to each other.
'broadcast' becomes 'scatter' (I've seen this in another clue).
'b'+'rained'='brained'
'brained' after 'scatter' is 'SCATTERBRAINED'.
'being' acts as a link.
(Other definitions for scatterbrained that I've seen before include "Unfocused" , "absent-minded" , "silly" , "Inclined to forget" , "poorly focused on the task?" .)