Strike, subject to restraint, likely to collapse (10)
I believe the answer is:
ramshackle
'likely to collapse' is the definition.
'strike subject to restraint' is the wordplay.
'strike' becomes 'ram' (I've seen this before).
'subject to restraint' becomes 'shackle' (to shackle someone is to restrain them).
'ram'+'shackle'='RAMSHACKLE'
(Other definitions for ramshackle that I've seen before include "Decrepit" , "falling to pieces" , "Badly-organised" , "Rickety - derelict" , "Broken-down" .)