And the Queen in a toboggan is defamed (9)
I believe the answer is:
slandered
'is defamed' is the definition.
(I've seen this in another clue)
'and the queen in a toboggan' is the wordplay.
'the queen' becomes 'ER' (abbreviation for Elizabeth Regina).
'in' is an insertion indicator.
'a toboggan' becomes 'sled' (toboggan is a type of sled).
'and'+'er'='ander'
'ander' put within 'sled' is 'SLANDERED'.
(Other definitions for slandered that I've seen before include "Calumniated" , "Made false and malicious statement about someone" , "Attacked the good name of" , "Defamed" .)