Not cheating like a blonde conservative? (4,3,6)
I believe the answer is:
fair and square
'not cheating like a blonde conservative?' is the definition.
I can't judge whether this defines the answer.
'not cheating like a blonde conservative?' is the wordplay.
'not cheating' becomes 'fair' (I've seen this in another clue).
'like a blonde' becomes 'and' (I am not sure about this - if you are sure you should believe this answer much more).
'conservative?' becomes 'square' (I've seen this before).
'fair'+'and'+'square'='FAIR-AND-SQUARE'
(Other definitions for fair and square that I've seen before include "On the level" , "In a proper way" , "Rightfully" , "Honest description" , "Justly and honestly" .)