Put restriction on funds of jewellery dealer (4-5)
I believe the answer is:
ring-fence
'put restriction on funds' is the definition.
I know nothing about this answer so I can't tell whether this works.
'jewellery dealer' is the wordplay.
'jewellery' becomes 'ring' (ring is a kind of jewellery).
'dealer' becomes 'fence' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'ring'+'fence'='RING-FENCE'
'of' is the link.
Can you help me to learn more?
(Other definitions for ring-fence that I've seen before include "estate security" , "Protect or guarantee - with circular hedge?" , "Allocate (funds) to one purpose" , "Guarantee funding" , "Complete barrier" .)