Healthy shade to be in (4)
I believe the answer is:
pink
'healthy' is the definition.
(thesaurus)
'shade to be in' is the wordplay.
I cannot really understand how this works, but
'in' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for pink that I've seen before include "Peer" , "one's found in bed" , "(Leftish) colour" , "stab" , "Colour; garden plant" .)