It has its day of enrichment! (3)
I believe the answer is:
pay
This might be a double definition.
'it has its day' is the first definition.
The definition suggests a singular noun which matches the answer.
'enrichment' is the second definition.
The definition and answer can be both related to property as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'of' acts as a link.
Can you help me to learn more?
(Other definitions for pay that I've seen before include "Settle up" , "Give money in exchange for goods or services" , "Remunerate" , "Screw" , "Reward for work" .)