He alone, one day, showed wisdom (7)
I believe the answer is:
solomon
'he alone one day showed wisdom' is the definition.
The definition suggests a singular noun which matches the answer. I also know that 'wisdom' relates to this answer.
'one day showed wisdom' is the wordplay.
I cannot really understand how this works, but
'one' could be 'solo' (I've seen this before) and 'solo' is present in the answer.
'day' could be 'mon' (abbreviation for Monday) and 'mon' is located in the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for solomon that I've seen before include "OT king" , "Proverbially wise king" , "Short-lived" , "King of Israel with great wisdom" , "Biblical wise king" .)