Queen in a fuddle? Bad -- very bad (8)
I believe the answer is:
dreadful
'very bad' is the definition.
(I've seen this before)
'queen in a fuddle? bad' is the wordplay.
'queen' becomes 'r' (r is abbreviation regina. e.g. in ER ).
'in' is an insertion indicator.
'bad' is an anagram indicator.
'a'+'fuddle'='afuddle'
'afuddle' is an anagram of 'deadful'.
'r' inserted within 'deadful' is 'DREADFUL'.
(Other definitions for dreadful that I've seen before include "Appalling, awful" , "Horrible, shocking" , "Informally very bad, perhaps the weather" , "Shockingly bad" , "Terrible" .)