Savoury taste (5)
I believe the answer is:
umami
'savoury taste' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for umami that I've seen before include "acquired taste perhaps" , "meaty taste" , "Newly discovered taste" , "Savoury taste sensation produced by glutamates - I, a mum (anag)" , "Fifth flavour" .)