Like healthy food, well done (4,3,3)
I believe the answer is:
good for you
'well done' is the definition.
(I've seen this before)
'like healthy food' is the wordplay.
I cannot quite understand how this works, but
'like' could be 'y' ('y' can be similar in meaning to 'like') and 'y' is found within the answer.
an anagram of 'food' is 'oodf' which is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for good for you that I've seen before include "wholesome" , "Very fatty steak may not be" , "like a healthy steak?" , "Vegetables are meant to be" , "congratulations" .)