Tied up, being low on wine (6)
I believe the answer is:
moored
'tied up' is the definition.
'moored' can be an answer for 'tied' (thesaurus). I'm not certain of the 'up' bit.
'low on wine' is the wordplay.
'low' becomes 'moo' (both can mean to make the noise of a cow).
'on' is a charade indicator (letters next to each other).
'wine' becomes 'red' (red wine is an example).
'moo'+'red'='MOORED'
'being' is the link.
Can you help me to learn more?
(Other definitions for moored that I've seen before include "Made fast" , "Tied up to berth like ship or boat" , "Of boat, tied up or secured" , "Secured by rope or cable" , "Of boat, secured by rope to shore" .)