Strand building shortly due for demolition? (10)
I believe the answer is:
sandcastle
'shortly due for demolition?' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.
'strand building' is the wordplay.
'strand' becomes 'sand' (I can't explain this - if you can you should believe this answer much more).
'building' becomes 'castle' (I have seen 'Fortified building' mean 'castle' so perhaps 'building' could also mean 'castle').
'sand'+'castle'='SANDCASTLE'
(Other definitions for sandcastle that I've seen before include "Model on a beach" , "Fortress constructed on the beach" , "one that goes with the flow?" .)