A lad’s fresh food (5)
I believe the answer is:
Here is my best explanation:
'food' is the definition.
(salad is a kind of food)
'a lad's fresh' is the subsidiary indication.
'fresh' indicates anagramming the letters.
'alads' with letters rearranged gives 'salad'.
(Other definitions for salad that I've seen before include "rabbit food", "- Days (musical)", "Cold meal", "Counter serving cold vegetable dishes", "healthy food", "Lettuce dish", "Cold vegetable dish", "Cold dish of veg and herbs", "Mainly raw cold dish" and "Raw greens, mainly".)