Scowl from one looking healthy (6)
I believe the answer is:
glower
I believe this is a double definition.
'scowl' is the first definition.
(I've seen this before)
'one looking healthy' is the second definition.
(somebody who is glowing)
'from' acts as a link.
(Other definitions for glower that I've seen before include "Not a good look" , "Angry/sullen look" , "Angry and sullen look" , "Look hotly or angrily" , "Look black" .)