She's in the pink (5)
I believe the answer is:
coral
I believe this clue is a double definition.
'she's' is the first definition.
'pink' is the second definition.
(coral is a shade of pink)
'in the' is the link.
(Other definitions for coral that I've seen before include "Marine growth" , "Carol (anag.)" , "Reef material" , "Deep pink 11 across" , "hard material" .)