First thing to do in the morning is dress (3-2)
I believe the answer is:
get-up
This clue is a double definition.
'first thing to do in the morning' is the first definition.
(as in getting up out of bed)
'is dress' is the second definition.
(I've seen this before)
(Other definitions for get-up that I've seen before include "Unusual or elaborate costume" , "Style of dress" , "Outfit" , "Jump out of bed" .)