Corporation with a good flipping range (5)
I believe the answer is:
gamut
'range' is the definition.
(gamut can mean a range or variety)
'corporation with a good flipping' is the wordplay.
'corporation' becomes 'tum' (I've seen this before).
'with' means one lot of letters go next to another.
'good' becomes 'g' (abbreviation).
'flipping' says the letters should be written backwards.
'tum'+'a'+'g'='tumag'
'tumag' in reverse letter order is 'GAMUT'.
(Other definitions for gamut that I've seen before include "Full extent" , "Compass, scale" , "Ambit" , "Complete extent or range" , "Complete range or scale" .)