Unacceptable, whichever way you look at it! (3,2)
I believe the answer is:
not on
This clue is a double definition.
'unacceptable' is the first definition.
(something 'not on' is unacceptable or frowned upon)
'whichever way you look at it' is the second definition.
(Other definitions for not on that I've seen before include "Out of the question" , "Modern usage for unacceptable" , "Common expression meaning won't be entertained or tolerated" , "Modern phrase for unacceptable" , "taboo" .)