Part of Missouri sent up (5)
I believe the answer is:
risen
'up' is the definition.
(similar in meaning)
'part of missouri sent' is the wordplay.
'part of' indicates the answer is hidden within the clue.
'RISEN' is hidden in the letters of 'missouri sent'.
(Other definitions for risen that I've seen before include "Climbed" , "Suggestive of soil" , "Resin (anag.)" , "Grown up" , "Gone up" .)