Serving of Dhansak or Madras, Indian dish (5)
I believe the answer is:
korma
'indian dish' is the definition.
(I've seen this before)
'serving of dhansak or madras' is the wordplay.
'serving of' says the answer is hidden in the clue.
'KORMA' is hidden within 'dhansak or madras'.
(Other definitions for korma that I've seen before include "Mild Indian curry" , "Mildly-spiced curry" , "Indian dish" , "Curry dish" .)