Being down at heel is not well (5)
I believe the answer is:
seedy
This clue might be a double definition.
'being down at heel' is the first definition.
(I've seen this in another clue)
'not well' is the second definition.
Both the answer and definition are adjectives. Maybe they are linked in a way I don't understand?
'is' is the link.
Can you help me to learn more?
(Other definitions for seedy that I've seen before include "Raspberry jam might be" , "Unfit" , "Out of sorts" , "Pip is" , "Down-at-heel" .)