Break up site calling for abolition of imperial measure (9)
I believe the answer is:
scrapyard
'break up site' is the definition.
(where things are broken up)
'abolition of imperial measure' is the wordplay.
'abolition of imperial' becomes 'scrap' (I can't justify this - if you can you should give a lot more credence to this answer).
'measure' becomes 'yard' (yard is a kind of measure).
'scrap'+'yard'='SCRAPYARD'
'calling for' is the link.
(Other definitions for scrapyard that I've seen before include "Dump" , "Metal recycling site" , "Totter's tip" , "recycling centre" , "Place for metal waste" .)