French ones have taste (5)
I believe the answer is:
fries
'french ones have taste' is the definition.
I can't judge whether this defines the answer.
'french ones have taste' is the wordplay.
'french' becomes 'fr' (abbreviation).
'ones' becomes 'Is' (I is the Roman numeral for one).
'have' means one lot of letters goes inside another.
'taste' becomes 'e' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'is' going around 'e' is 'ies'.
'fr'+'ies'='FRIES'
Can you help me to learn more?
(Other definitions for fries that I've seen before include "Cooks in fat" , "food for grazing?" , "Cooks; chips (Amer.)" .)