Evaluate, analyse (5)
I believe the answer is:
assay
This clue is a double definition.
'evaluate' is the first definition.
(I've seen this before)
'analyse' is the second definition.
(assaying is a kind of analysing)
(Other definitions for assay that I've seen before include "Test quality of metals" , "'Analyse, precious metal, say (5)'" , "metallurgical test" , "Test ore for content" , "Test gold" .)