Profile that is restricting publication (5)
I believe the answer is:
image
'profile' is the definition.
(eg someone's public profile or image)
'that is restricting publication' is the wordplay.
'that is' becomes 'ie' (abbreviation for id est, 'that is' in Latin).
'restricting' is an insertion indicator.
'publication' becomes 'mag' (abbreviation for magazine).
'ie' enclosing 'mag' is 'IMAGE'.
(Other definitions for image that I've seen before include "sculpture" , "Representation, picture" , "Picture; simile" , "public perception" , "Vision" .)