Herb helping to make healthy meal (5)
I believe the answer is:
thyme
'herb' is the definition.
(I know that thyme is a type of herb)
'helping to make healthy meal' is the wordplay.
'helping to make' indicates the answer is hidden within the clue.
'THYME' is hidden in the letters of 'healthy meal'.
(Other definitions for thyme that I've seen before include "Aromatic culinary herb; sounds like occasion" , "Sweet-smelling herb of the mint family" , "Aromatic plant" , "Minty herb" , "Herb used in cooking as seasoning" .)