Client wants some foreign jewellery item (9)
I believe the answer is:
dependant
'client' is the definition.
(I've seen this before)
'some foreign jewellery item' is the wordplay.
'some foreign' becomes 'de' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'jewellery item' becomes 'pendant' (I've seen this before).
'de'+'pendant'='DEPENDANT'
'wants' is the link.
Can you help me to learn more?
(Other definitions for dependant that I've seen before include "Child maybe" , "Dented pan? (anag)" , "Subject to" , "Protg" , "Client" .)