Flower I get out of bed shortly (4)
I believe the answer is:
iris
'flower' is the definition.
(iris is a type of flower)
'i get out of bed shortly' is the wordplay.
'get out of bed' becomes 'rise' (synonyms).
'shortly' means to remove the last letter.
'rise' with its final letter taken off is 'ris'.
'i'+'ris'='IRIS'
(Other definitions for iris that I've seen before include "Fleur-de-lys" , "Pupil's place?" , "Film about writer _______ Murdoch" , "Female" , "Eye diaphragm" .)