'Exotic' millionaire Cher cherished – to some extent (9)
I believe the answer is:
recherche
'exotic' is the definition.
(I've seen this before)
'millionaire cher cherished to some extent' is the wordplay.
'to some extent' indicates a hidden word.
'RECHERCHE' is hidden within 'millionaire cher cherished'.
(Other definitions for recherche that I've seen before include "Rare or exotic (French)" , "Little-known" , "Rare or far-fetched, like her creche" , "choice" , "Rare, exotic, obscure" .)