Some monosaccharides get desiccated (4)
I believe the answer is:
arid
'desiccated' is the definition.
(both can mean dry)
'some monosaccharides' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'ARID' can be found hidden inside 'monosaccharides'.
'get' acts as a link.
(Other definitions for arid that I've seen before include "Dry and sere" , "Parched and barren" , "Dry and barren" , "Wadi may be this" , "Dry and parched, as with regions" .)