What a drinker may do to his hands (3)
I believe the answer is:
cup
'what a drinker may do to his hands' 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 cup that I've seen before include "Trophy; drinking vessel" , "competition" , "Trophy, drink" , "Award; mug" , "Beaker" .)