Flowers one gets out of bed (6)
I believe the answer is:
irises
'flowers' is the definition.
(type of flower)
'one gets out of bed' is the wordplay.
'one' becomes 'i' (Roman numeral).
'gets out of bed' becomes 'rises' ('rise' can be a synonym of 'get out of bed').
'i'+'rises'='IRISES'
(Other definitions for irises that I've seen before include "Plants with sword-shaped leaves" , "Parts of eyes or flowering plants" , "Eye membranes or showy flowers." , "blooms" , "Coloured membranes in eyes, or showy flowers" .)