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 can't tell whether this works.

'left over weeks in ewers lacks body' is the wordplay.
'left over' becomes 'lo' (this might be a standard abbreviation which I don't know about).
'weeks' becomes 'ww' (the abbreviation for week written twice).
'lacks body' suggests removing the centre (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?