Call for some jewellery (4)
I believe the answer is:
ring
This clue is a double definition.
'call' is the first definition.
(telephone call)
'some jewellery' is the second definition.
(ring is a kind of jewellery)
'for' is the link.
(Other definitions for ring that I've seen before include "Circular, band of metal say" , "Sound a doorbell" , "Circus arena" , "Buzz" , "Besiegers' formation" .)