University blocking national memorial? (6)
I believe the answer is:
Here is my best explanation:
'memorial?' is the definition.
'university blocking national' is the subsidiary indication.
'university' becomes 'u'.
'blocking' is an insertion indicator.
'national' becomes 'state' (I can't explain this - if you can you should believe this answer much more).
'u' placed within 'state' is 'statue'.
(Other definitions for statue that I've seen before include "One representing liberty", "Figure, effigy", "Artistic figure", "As created by 3dn", "Use tat (anag.)", "Piece of sculpture", "Art work", "Stiff sort of personality", "Life sculpture" and "Carved likeness".)