Devise a test for flavour (5)
I believe the answer is:
taste
'for flavour' is the definition.
(I've seen this before)
'devise a test' is the wordplay.
'devise' indicates anagramming the letters (I've seen 'devised' mean this).
'a'+'test'='atest'
'atest' is an anagram of 'TASTE'.
(Other definitions for taste that I've seen before include "Show sense" , "Brief experience (of something)" , "to eat in small amounts" , "Refinement or flavour" , "Judgment" .)