It may be drawn or sucked up (5)
I believe the answer is:
straw
'it may be drawn or sucked up' is the definition.
The definition suggests a singular noun which matches the answer.
This is all the clue.
Can you help me to learn more?
(Other definitions for straw that I've seen before include "Means to absorb" , "Dried grain stalks" , "Warts (anag.)" , "Pale yellow colour" , "Residue of cereal crop" .)