Go quickly round one partly destroyed building (4)
I believe the answer is:
ruin
'destroyed building' is the definition.
(I've seen this in another clue)
'go quickly round one' is the wordplay.
'go quickly' becomes 'run' (I've seen this in another clue).
'round' indicates putting letters inside.
'one' becomes 'I' (Roman numeral).
'run' going around 'i' is 'RUIN'.
'partly' is the link.
I am not very happy about this link. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for ruin that I've seen before include "loss of position" , "Catastrophe" , "financial hardship" , "Building remains" , "dishonour" .)