Slag off Guardian setter, turning on a Guardian setter (6)
I believe the answer is:
defame
'slag off guardian' is the definition.
I can't tell whether this defines the answer.
'setter turning on a guardian setter' is the wordplay.
'setter' becomes 'Fed' (Fed is a Guardian crossword setter).
'turning' says the letters should be written backwards.
'on' means one lot of letters go next to another.
'guardian setter' becomes 'me' (the setter of the clue. I am not sure about the 'guardian' bit.).
'fed' reversed gives 'def'.
'def'+'a'+'me'='DEFAME'
Can you help me to learn more?
(Other definitions for defame that I've seen before include "Injure the reputation of" , "to pretetrate slander?" , "Damage the reputation (of someone)" , "Attack good reputation, speak ill of" , "Malign" .)