Figure label required on front of case, nothing on bags (7)
I believe the answer is:
octagon
'figure' is the definition.
(octagon is a kind of figure)
'label required on front of case nothing on bags' is the wordplay.
'label' becomes 'tag' (synonyms).
'required on' means one lot of letters go next to another.
'front of' indicates taking the first letters.
'nothing' becomes 'o' (looks like zero - 0).
'bags' indicates putting letters inside (bag can mean secures or steals).
The first letter of 'case' is 'c'.
'tag' put after 'c' is 'ctag'.
'ctag'+'o'='ctago'
'ctago' put within 'on' is 'OCTAGON'.
(Other definitions for octagon that I've seen before include "plane figure" , "Geometric figure with eight sides" , "Eight-sided figure" , "Eight-sided object" , "Figure with 8 sides" .)