Further tied up after second lockdown (6)
I believe the answer is:
onward
'further' is the definition.
Both the answer and definition are adjectives. Perhaps there's an association between them I don't understand?
'tied up after second lockdown' is the wordplay.
'tied' becomes 'drawn' ('draw' can be a synonym of 'tie').
'up' says the letters should be written in reverse (in down clue: letters go upwards).
'after' says to put letters next to each other.
'second lockdown' becomes 'o' (2nd letter of 'lockdown').
'drawn' backwards is 'nward'.
'nward' after 'o' is 'ONWARD'.
Can you help me to learn more?
(Other definitions for onward that I've seen before include "progressive" , "Advanced" , "With advancing motion" , "Advancing (like Christian soldiers?)" , "Going on, advancing" .)