Measured and mixed malt and rice (8)
I believe the answer is:
metrical
'measured' is the definition.
('metrical' can be a synonym of 'measured')
'mixed malt and rice' is the wordplay.
'mixed' indicates anagramming the letters.
'and' says to put letters next to each other.
'malt'+'rice'='maltrice'
'maltrice' with letters rearranged gives 'METRICAL'.
'and' acts as a link.
(Other definitions for metrical that I've seen before include "like a work of poetry" , "related to measurement" , "Referring to poetic feet" , "Calm rite (anag) - that scans" , "some psalm translations" .)