Man who had everything twice over (4)
I believe the answer is:
noah
'man' is the definition.
'had everything twice over' is the wordplay.
I cannot really see how this works, but
'over' could be 'o' (cricket abbreviation) and 'o' is located in the answer.
The remaining letters 'nah' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'who' acts as a link.
Can you help me to learn more?
(Other definitions for noah that I've seen before include "Early boatman" , "Biblical ark builder" , "He survived 40 days and 40 nights of rain" , "Hebrew patriarch who survived the Flood" , "Biblical sailor" .)