Company acquiring label in acceptable shape (7)
I believe the answer is:
octagon
'shape' is the definition.
(octagon is a kind of shape)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for octagon that I've seen before include "Eight-sided room" , "Figure of many sides" , "Eight-sided figure" , "Shape of a square with the corners cut off" , "Geometric figure with eight sides" .)