Building changes hands, when the 2D gets new occupants (8)
I believe the answer is:
election
'building changes hands' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
'when the 2d gets new occupants' is the wordplay.
I cannot really see how this works, but
'when' could be 'on' (I've seen this in other clues) and 'on' is found within the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for election that I've seen before include "Selection by ballot" , "Time to vote" , "Ballot for public office" , "When MPs are chosen" , "Voting opportunity" .)