Harry is naughty then good with Queen (6)
I believe the answer is:
badger
'harry' is the definition.
(thesaurus)
'naughty then good with queen' is the wordplay.
'naughty' becomes 'bad' ('bad' can be similar in meaning to 'naughty').
'then' is a charade indicator (letters next to each other).
'good' becomes 'g' (abbreviation).
'with' is a charade indicator (letters next to each other).
'queen' becomes 'er' (abbreviation for Elizabeth Regina).
'bad'+'g'+'er'='BADGER'
'is' is the link.
(Other definitions for badger that I've seen before include "Nocturnal black and white animal" , "Annoy the burrower persistently" , "A mammal; harry" , "Member of the weasel family" , "who pins an emblem on?" .)