Weak spirit left over weeks in ewers lacks body (3,5)

'weak spirit' is the definition.
I don't know anything about this answer so I cannot tell whether this works.

'left over weeks in ewers lacks body' is the wordplay.
'left over' becomes 'lo' (this could be a standard abbreviation I've not previously seen).
'weeks' becomes 'ww' (the abbreviation for week written twice).
'lacks body' says to hollow out the word (remove centre letters) (I've seen 'lacking body' mean this (body can mean content)).
'ewers' with its centre taken out is 'es'.
'lo'+'ww'+'in'+'es'='LOW WINES'

Can you help me to learn more?