Culinary herb helping to make healthy meal (5)
I believe the answer is:
thyme
'culinary herb' is the definition.
(thyme is a culinary herb)
'helping to make healthy meal' is the wordplay.
'helping to make' indicates the answer is hidden within the clue.
'THYME' is hidden within 'healthy meal'.
(Other definitions for thyme that I've seen before include "Herb used in cooking as seasoning" , "Small shrub: leaves used to season food" , "Mint relative" , "Small shrub with minty odour" , "Ingredient in cooking" .)