Pawn jewellery bringing in unknown one for valuing (7)

I believe the answer is:

prizing

'valuing' is the definition.
('prize' can be a synonym of 'value')

'pawn jewellery bringing in unknown one' is the wordplay.
'pawn' becomes 'p'.
'jewellery' becomes 'ring' (ring is a kind of jewellery).
'bringing in' indicates putting letters inside.
'unknown' becomes 'z' (algebra).
'one' becomes 'i' (Roman numeral).
'z'+'i'='zi'
'ring' placed around 'zi' is 'rizing'.
'p'+'rizing'='PRIZING'

'for' is the link.

(Another definition for prizing that I've seen is " Valuing".)

I've seen this clue in The Telegraph.

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