Snap judgement ultimately had adjusted price in advance (9)

'snap' is the definition.
(thesaurus)

'judgement ultimately had adjusted price in advance' is the wordplay.
'ultimately' suggests the final letters.
'had' becomes 'ate' (e.g. I had an ice cream).
'adjusted' is an anagram indicator.
'in advance' says to put letters next to each other.
The final letter of 'judgement' is 't'.
'price' anagrammed gives 'crepi'.
't'+'ate'='tate'
'tate' after 'crepi' is 'CREPITATE'.