Prepared in the morning, as salad may be? (7)
I believe the answer is:
dressed
This clue is a double definition.
'prepared in the morning' is the first definition.
(put on clothes)
'as salad may be?' is the second definition.
(addition of a dressing to salad)
(Other definitions for dressed that I've seen before include "Wearing clothes" , "Brought into line" , "with mayonnaise, say" , "Clothed" , "Arranged" .)