Unusually harsh cement used around Olympic venue (11)
I believe the answer is:
masochistic
'unusually harsh' is the definition.
'cement used around olympic venue' is the wordplay.
'cement' becomes 'mastic' (mastic is a kind of cement).
'used around' is an insertion indicator.
'olympic venue' becomes 'sochi' (Winter Olympics host city).
'mastic' enclosing 'sochi' is 'MASOCHISTIC'.
(Other definitions for masochistic that I've seen before include "Enjoying one's own pain" , "Unnaturally desiring" .)