Treats drunk to a leg-over? (7)

'treats' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.

'drunk to a leg-over?' is the wordplay.
'drunk' becomes 'sot' (both can mean someone who drinks too much).
'to' means one lot of letters go next to another.
'over?' says the letters should be written in reverse (I've seen 'over ' mean this).
'sot'+'a'+'leg'='sotaleg'
'sotaleg' in reverse letter order is 'GELATOS'.

Can you help me to learn more?