Hospital admits mistake over type of ham (7)

'type of ham' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.

'hospital admits mistake over' is the wordplay.
'hospital' becomes 'san' (short for sanatorium).
'admits' means one lot of letters goes inside another (to admit is to allow in).
'mistake' becomes 'err' (to err is to make a mistake or blunder).
'over' becomes 'o' (cricket abbreviation).
'san' placed around 'err' is 'serran'.
'serran'+'o'='SERRANO'

Can you help me to learn more?