Defiant, consumed by desires, is tantalised (9)
I believe the answer is:
resistant
'defiant' is the definition.
(similar in meaning)
'consumed by desires is tantalised' is the wordplay.
'consumed by' indicates the answer is hidden within the clue (inserted letters get consumed).
'RESISTANT' is hidden in the letters of 'desires is tantalised'.
(Other definitions for resistant that I've seen before include "Not easily convinced" , "Not affected by something, a bug by an antibiotic say" , "Being hostile" , "not accommodating" , "Impervious (to corrosion, heat, etc)" .)