Where stamen of dianthus is enjoying good health (2,3,4)
I believe the answer is:
in the pink
'enjoying good health' is the definition.
I don't know anything about this answer so I cannot judge whether this works.
'where stamen of dianthus' is the wordplay.
I cannot quite understand how this works, but
'dianthus' could be 'pink' (I've seen this in another clue) and 'pink' is found in the answer.
The remaining letters 'inthe' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'is' is the link.
Can you help me to learn more?
(Other definitions for in the pink that I've seen before include "fighting fit?" , "huntsmen are" , "suited for hunting?" , "Enjoying perfect health" , "How Britain's colonies appeared on maps" .)