You've misspelled "blue," squire! (6)
I believe the answer is:
risque
'you've misspelled' is the definition.
I can't judge whether this defines the answer.
'blue squire' is the wordplay.
'blue' indicates anagramming the letters (blue can mean a mistake).
'squire' is an anagram of 'RISQUE'.
Can you help me to learn more?
(Other definitions for risque that I've seen before include "Daring" , "Bordering on the improper" , "Slightly improper" , "Of a story, slightly indecent" , "Blue" .)